My Classmate Is My Dad's Bride. But in Bed She's Mine.

The school idol is my stepmother ?!
Under the same roof, living together with her begins.

My unrequited love, Erika, appears before my eyes saying that she has become my father's wife.
A sudden start from the first day of my new life leading to a series of events...!

Note: Originally serialized as a web manga under t...