Tokyo: I took in my ex's twin sister (1-151).

Summary

Sawayama Haruno, a first-year student at the University of Tokyo, feels disconnected from the enthusiastic atmosphere of his peers. He encounters Mine Shiori, a classmate who invites him to a café to thank him for returning a lost necklace. Despite his initial reluctance, Haruno agrees to meet her. In class, they sit together, and Mine Shiori expresses concern for Haruno's well-being, particularly regarding a fight with his younger sister, Maki, who has run away to a friend's house. Shiori offers advice, suggesting that they both need space to cool down. Haruno reflects on his complicated feelings about his sister and his past with another girl, Mana. Meanwhile, Maki wakes up in an unfamiliar room, grappling with her feelings and the implications of being treated like her older sister, Mana.

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