If you're looking for manga similar to Imouto ga Dekimashita., you might like these titles.
Kazuka Kojima is a pretty and popular high school girl secretly obsessed with the idol "Kane-chan". When her parent remarried, she found out her new step-sister Akane is the "everyone's sister" - the "Kane-chan" of her dreams!
One day, Shio arrives home to find that her mother has gotten remarried and is going on a business trip with her new husband, leaving Shio with her new stepsister Kafka. Being only a day older than Kafka, Shio is concerned that Kafka will try to take the big sister position from her. Kafka, on the other hand, is determined to make Shio, who was her first love, fall for her.
Sayako is in love with a fashion model Ria. One day she runs into someone that gives off the same atmosphere. As it turns out, it's Ria's reclusive little sister. Sayako plans to use the sister to get close to Ria, but all of sudden she's beginning to develop feelings for her instead.
As the daughter of a mom who is always working, Satono lives a lonely life. She's so afraid of being left alone that she self-isolates to prevent anyone from leaving her. But when her mom suddenly remarries, she gains an older stepbrother, Ryo. All Satono wants is a family, but all Ryo wants is to hang out with his friends. Can this pair work out their differences?
Includes the following chapters:
One girl thinks that love is like chocolate, while another thinks it's more like cigarette smoke.
A girl is in love with her bestfriend who happens to be straight....or is she?