The New Onodera

Ritsu's parents had a child three years before him, but they weren't ready to have the child so they gave her up for adoption. Well, she just happens to meet Masamune Takano and Takafumi Yokozawa in College. While there, she ends up pregnant with Takafumi's son, Kaoru Yokozawa. 7 years after she leaves her two best friends, she is greeted with one and has to explain everything. But then again she also has to convince her mother to let her be with the woman who is technically her brother's fiance.

AN: Picture is the character her name is Haruhi Onodera.