Plot: Abe Yuma is a piano teacher who only has his mum, Kasumi. One day he gets a call that his mum is sick, and gets to know Yoshida Ibuki (Sewada Ibuki), who was her caregiver, also the father of one of his students, Maika. Yuma, develops feelings for Ibuki since their first meeting. After Yuma refuses to sleep with him, Ibuki falls ill. At hospital Yuma and Ibuki have a heartfelt conversation (2nd volume), where Ibuki confess that Maika is not his real child, but the daughter of a man (Sewada Seiji) whom he met while offering sex services to pay for his mother's illness. Seiji died after leaving Maika in his care. They decide to get together and choose their happiness. 10% smut.
Comments: Typical japanese BL, where drama is present and characters have depth. A better quality and more smut would make it more enjoyable.
Ibitsuna Bokura no Katachi