Isso Anata ga Todome wo Sashite

From K Manga:
I want you to never stop smiling.” Ichika, a college student, just wants to have a normal romance for once, yet because of her flashy appearance, she is often misunderstood. Not ready to give up on a romantic encounter, Ichika joins a drinking party and meets a kind boy named Kosei. They immediately click and Ichika has a great time talking to him about their mutual interests and other things, and she finds herself falling for him after he tells her that he likes her for who she is. However, he has a secret.