Yamato agrees to take care of the abandoned black kitten he and Mei found by the roadside. One day, he invites her over to his house to introduce Kuro, the black kitten, to Mei's white cat Marshmallow. Mei then gets to meet Nagi, Yamato's younger sister. Upon returning after Kenji asked him to get a gift from him and Asami, Yamato finds Kuro, Marshmallow, Mei and Nagi sleeping together on the couch in his room.