 If you liked
Kimi ga Inakerya Iki mo Dekinai
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 ...then you might like
Sekaiichi Hatsukoi: Onodera Ritsu no Baai
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Kimi ga Inakerya Iki mo Dekinai and the story of Chiaki and Hatori are similar because of the characters personalities. Uke are both messy, childish human beings, completely unaware of love, focused on drawing manga and sleeping in semes beds after deadline. They rely on seme characters in terms of cooking, cleaning and in board meaning just making the living. Also the couples were childhood friends and they were always together.