The first chapter of this manga was released recently. It is about a super serious girl with long black hair who is on the student council. I think she is the Pres. One guy on her council is very popular, bubbly personalty ,good student. Both of them have a secret . The girl mom is a cook and owns a love hotel. One day the girl is cleaning and finds the boy in one if the rooms with another girl. From the shock she falls and makes a mess in the room , and lands in a compromising position. The boy takes a picture of her to blackmail her. Well that's how the chapter ends. Thanks!!!

Watanuki-san ni wa Boku ga Tarinai?

The manga is called [m]"Watanuki-san ni wa Boku ga Tarinai"[/m] as previously mentioned.