You're sitting in your room doing homework. Screams and barking dogs grew louder outside the window. You curiously went to open the window. A figure running back and forth is Isao. Running behind is a cute puppy, it seems he has been chased by that puppy.

"Ahhh! Somebody help me!"

Isao has Mysophobia and he's afraid of dogs. The first time you two met, you accidentally spilled milk on his head, dirtying his hair. He then scolded you and you two have known each other ever since.