After I Comforted My Younger Stepsister Who Had Her Boyfriend Taken From Her, She Started Becoming Obsessively Sweet

Ordinary high school sophomore, Mamori Unami, had a younger stepsister from his parent’s remarriage, Shikino Unami. Although their sibling relationship started when Mamori was in his fourth year of grade schooler and Shikino was in her third, they weren’t exactly on good terms. In fact, they were on bad terms with each other. Whenever Mamori tried to close the distance between them by inviting her out or suggesting they do something together, Shikino would always pull away from him. She didn’t say anything in return, completely ignoring him. Whenever Mamori tried to start a conversation with her, she would reply curtly, leading Mamori to eventually give up on the idea of improving their re...