A relaxing stay at a traditional ryokan quickly turns into one misunderstanding after another as family, foreign visitors, and an absurd passport dispute collide in Grand Blue Season 3 Episode 3.
The episode starts with a reminder that the series is a work of fiction and that the drinking scenes are presented purely as comedy featuring adults of legal age.
Back at Kitahara Ryokan, everyone enjoys a traditional meal prepared for the guests. Imamura is especially impressed by the food, and Shiori modestly explains that she didn't actually cook any of it herself. The conversation soon shifts toward Iori's childhood, with him revealing that growing up at the family inn wasn't as luxurious as it sounded because the family mostly ate leftovers that couldn't be served to guests. Shiori then fondly remembers how Iori often cooked for her when they were younger since their parents stayed busy running the ryokan.
The relaxed dinner turns into another amusing exchange when Imamura eagerly asks whether Shiori could prepare homemade food for his trip home. Shiori happily agrees without hesitation before offering to make something for Chisa as well. As she imagines everyone riding the train home enjoying her handmade meals, she jokingly pictures Iori carrying a "homemade passport" instead, making everyone pause as Iori immediately questions why his passport has suddenly become part of her fantasy.
After finishing her work for the day, Shiori changes from her kimono into a yukata so guests won't mistake her for someone still on duty. Chisa and Imamura compliment how well it suits her, but Iori's reaction quickly heads in a completely different direction. Rather than simply praising his sister, he complains that she lacks sex appeal and even suggests adjusting the yukata to reveal more cleavage. His outrageous request immediately earns shocked reactions from everyone else, while Shiori becomes visibly uncomfortable with how closely he's staring at her.
The conversation soon circles back to the mysterious stalker that has been causing concern around the ryokan. Shiori points out that if Iori plans to spend the night watching over her room, she'll need somewhere else to sleep. Kohei instantly rejects sharing his own room with Iori, while Chisa casually offers her room instead because she's worried about the recent incidents after hearing the police had already visited the inn. The group agrees that keeping Shiori safe is the top priority, although Iori can't resist making another joke about finally getting his passport back if everything works out.
Before long, Carina arrives carrying drinks as an apology for the awkward events earlier in the day. While chatting with everyone, she reveals that her traveling companions have secretly disappeared into another room. According to Carina, they've been hiding photographs, whispering over a map, and refusing to explain what they're planning. Hearing that immediately raises Iori and Kohei's suspicions, and once they learn the pair are staying in the Pine Room, they decide it's worth investigating before anything strange happens.
Pretending to be police officers, Iori and Kohei boldly knock on the visitors' door and announce themselves with complete confidence. Although the room appears perfectly normal at first glance, both instantly become convinced something suspicious is happening. Their solution is simple—they order the two visitors to remain inside their room and behave themselves for the rest of the night.
Their bluff doesn't last long. The two foreign guests immediately recognize Iori and Kohei from their earlier encounter and confidently challenge them again. What follows is another ridiculous drinking contest as both sides try to prove they're the tougher drinkers. The visitors boast that their usual alcohol is much stronger than ordinary drinks and laugh at the idea that Japanese drinkers need water alongside their alcohol.
Rather than backing down, Iori changes the rules by proposing that both the alcohol and the so-called "chasers" have to be consumed. The challenge begins with both sides raising their glasses, but the foreign guests quickly discover that what they assumed was plain water is actually another alcoholic drink. Shocked by the unexpected sweetness, they struggle to understand how anyone could call it a chaser. Iori and Kohei calmly explain that the sweeter liquor is ordinary alcohol to them, while the stronger drink is what they consider the real chaser, completely turning the visitors' assumptions upside down.
Satisfied that the pair aren't actually dangerous, Iori concludes that their obsession is simply rooted in anime fandom rather than any criminal intent. As everyone heads back, another realization suddenly strikes him. Since the two visitors belong to the same fan club as Carina, he begins wondering whether Carina herself might be just as passionate about Japanese pop culture as they are. That question becomes even more interesting when Carina sits down with Chisa and Shiori, explaining that she wants to learn more about Japanese culture during her stay.
At first, Carina unexpectedly asks about Japan's hentai culture before quickly clarifying that her interest comes from researching Hokusai's erotic artwork rather than simple curiosity. Since neither Chisa nor Shiori knows much about the subject, Carina smoothly changes topics and asks about everyday Japanese customs instead, beginning with proper etiquette for using a traditional hot spring. The conversation settles into a much calmer atmosphere, but it also hints that Carina's fascination with Japanese culture may be much broader than anyone initially expected.
As Iori reflects on the similarities between Carina and her companions, Kohei points out that anyone willingly traveling across Japan with such eccentric anime fans probably shares their interests. The conversation takes another turn when they remember the mysterious stalker seemed fairly slender, prompting them to wake the two visitors and question them about Carina instead. A translation app helps bridge the language gap, but the discussion immediately veers off course after Iori asks what Carina likes about Japan. Rather than answering directly, the visitors assume he's romantically interested in her and enthusiastically encourage him to marry her, leaving Iori completely bewildered.
Trying to get the conversation back on track, Iori asks what Carina intends to do with Shiori and Chisa. This time, the answer reveals the truth behind her unusual behavior. According to the visitors, Carina is an enormous fan of the game Blue Spring and sees similarities between one of its characters and the girls staying at the ryokan. She hopes to recreate scenes from the game through them, while the visitors passionately explain that living out the events of a favorite visual novel in real life would be a dream come true. Their excitement grows so intense that even the language barrier begins to disappear as everyone bonds over their shared enthusiasm for the game.
The atmosphere changes instantly once Chisa searches for the title herself and discovers that Blue Spring is actually an adults-only game. Horrified by what she reads, she refuses to let anyone turn Shiori into part of their fantasy. The visitors argue that fiction and reality should be kept separate and insist they aren't planning to reenact explicit scenes, while Iori remains more concerned with retrieving the passport Shiori confiscated earlier. The group finally decides to split up, with some distracting Shiori while Iori looks for his passport, despite Chisa repeatedly trying to stop their increasingly reckless plan.
Meanwhile, Carina continues asking Chisa and Shiori about Japanese customs while relaxing in the outdoor hot spring. Chisa patiently explains proper bath etiquette, such as keeping towels out of the water, and Carina happily absorbs every detail. However, her thoughts soon drift back to Blue Spring as she silently compares the scene in front of her to one from the game. Although she briefly imagines recreating another famous sequence, she quickly keeps those thoughts to herself when Chisa notices someone watching. Instead, Chisa casually invites Carina to spend more time together after their bath, completely unaware of the fantasy running through Carina's mind.
While leaving the bath, Carina notices a passport lying nearby and returns it to Shiori. That simple act unexpectedly reveals the truth behind the missing document. Shiori calmly explains that the passport belongs to her brother and recounts how she deliberately took it because she wanted to teach him a lesson for refusing to think seriously about his future. Carina completely misunderstands the explanation, enthusiastically interpreting the sibling argument as something straight out of the kind of stories she loves. No matter how firmly Shiori denies it, Carina remains convinced she's witnessing an authentic version of the dramatic relationships found in her favorite fiction.
Elsewhere, the aftermath of Iori and Kohei's earlier mission leaves complete chaos behind. The room is in disarray, Iori has somehow fallen asleep standing upright, and even Shiori can't figure out what actually happened. Curious, she quietly retraces the night's events, eventually uncovering that Iori wasn't simply searching for his passport. Deep down, he genuinely worried that Shiori's desire to satisfy other people's expectations might leave her vulnerable if the overly enthusiastic fans pushed things too far. Despite his usual carefree attitude, his concern as an older brother proves surprisingly sincere beneath all the comedy.
That heartfelt misunderstanding creates yet another unexpected twist. After hearing the translated conversation, Carina concludes that Iori must have been asking about her because he's interested in her personally. Rather than feeling embarrassed, she happily announces that she's going to marry him. She explains that she already loves Japan, believes Iori would accept her otaku interests, and even likes the idea that marrying him would make Shiori part of her family. Before anyone can recover from the shock, she excitedly suggests living together during her stay in Japan, imagining a summer filled with traditional hospitality and the experiences she's always dreamed of.
The episode ends with Iori returning completely unaware of the whirlwind of misunderstandings surrounding him. Before Carina can say much, Shiori suddenly hands his passport back without putting up any resistance and casually tells him to enjoy his trip to Palau. Iori is left utterly confused by the sudden change of heart, while Kohei admits he has no idea why Shiori gave up the passport so easily, closing another wildly unpredictable chapter of Grand Blue Dreaming Season 3 Episode 3 on one final comedic mystery.
Grand Blue Season 3 Episode 3 keeps the comedy rolling from beginning to end by stacking one misunderstanding on top of another without slowing the pace. The drinking contest delivers classic Grand Blue absurdity, while the passport subplot unexpectedly reveals Iori's protective side beneath all the jokes. Carina easily steals the spotlight thanks to her boundless enthusiasm for Japanese culture and her completely off-target conclusions, creating some of the episode's funniest moments. Even with the nonstop comedy, the sibling interactions between Iori and Shiori add just enough heart to balance the chaos, making this another thoroughly entertaining episode that never runs out of surprises.

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