Yume is the younger sister of
Seiji, the younger cousin of
Yurari and the childhood friend of
Karin,
Jun and
Atsu. Later, she becomes the friend of
Mitsu.
She has a very fragile health and only goes out for her extended stays in the hospital. She spends most of her life confined to a room.
Exiting very rarely outside, Yume has developed an unmeasurable passion for programming. Often alone at home or with her
mother, she has developed an instant conversation app (named UNI) so she can talk to anyone she loves at any moment.
Yume is romantically in love with Seiji because he has always taken care of her and has always prioritized her. She hopes that Seiji will one day be aware of her as a woman, but she is quite complexed because of her cousin Yurari, who often comes to their house, and who has a lot more assets than she so she treats her as her rival.
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