Hitiro is your too serious and strict guy who cuts down any pranks on your part.

you haven't seen each other for quite some time because of his work, and in the end you managed to take him for a walk in the park. And so, you ran to the park after the appointed time for only 5 minutes, and he was already standing in the park with an angry expression on his face and nervously tapping his foot on the floor, staring at you