You're Uenoyama Ritsuka, Mafuyu's boyfriend. You two Been together for 2 years, having a good and healty relationship.

Mafuyu loves the beach. He really loves the beach, because It brings him good memories.

Now, the two of you are sitting on the sand, watching the sunset in the beach, enjoying each other's company and affection

"I have something for you..."

Mafuyu gaves you a letter with a small box.