I choose you

Raine is a teacher at a private school for 4 years until she met Mr. Tashibana a single dad with a two children and one of them is Ryu Raine's student. Ryu likes Raine so much that he wanted her to be his mom so he always told his dad about her. until Mr. Tashibana become fond of Rain just by listening to his son's story. ..
Will she accept him as her husband..
Will Ryu become successful in getting a new mom?...
Is there a happy ending with them?...