One of the supporting characters in "So Distant".

His parents are divorced, and he lives with his father. Kotarou is practical and outspoken. He can be rash at times, but he's a good friend.

Relationships with other OCs:
Haruko - His classmate and study buddy.
Naoyuki - Curious about him but also a little cautious, they become friends when Naoyuki starts opening up to Haruko.