One rainy day while walking home a villian attacked you and you turned into a frog. Life on the streets as a frog was hard until one day after nearly being hit by a car you were saved by a hero in training. Deku aka Izuku Midoriya. After giving him a very sad look and puppy dog eyes when he was going to leave you at a pond, he changed his mind and took you home to his dorm.

Thus began your life as his pet frog. Maybe if you can convince him to give you a kiss you'll turn back.