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

Summary

Sawayama Haruno reflects on his relationship with Ayano Yui, trying to maintain a normal interaction despite underlying tensions. Ayano Yui visits him early, expressing her desire to take him out for breakfast, which they do at a bakery. Haruno is puzzled by her taste in food and they discuss plans for the day, including a trip to the library where he intends to work on a competition submission. Ayano Yui, feeling bored in the library, decides to draw an erotic comic featuring herself and her brother, using her artistic skills to create a playful fantasy. Despite Haruno's focused work, Ayano's mischievous nature leads her to engage in her creative endeavor.

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