Koibito Wa 16-Sai

Sawaguchi Ruka is 20 years old and going to college. During high school she was cheated on and the guy blamed it on her. Ruka than meets Soushrou, an irritating 16 year old, whom she can’t get out of her head. In an attempt to forget about him she dates Murai, a co-worker, but instead she finds herself wanting to spend more time with Soushrou?