I Don't Love You Yet

The Return of the Worst Ever Ex-Boyfriend (1x7)

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Ren tells Yo that her ex-boyfriend, Ryusei, has become a CEO and that he is back in the city. As Yo begins cleaning up the objects that remind her of the time when she lived with Ryusei, she realizes that she can't stop thinking of him - the man who left her without a word 5 years ago.