菱形窓
One of the central characters of [[Summertime Render]], elder [[brother and sister|brother]] of [[Hishigata Tokiko]], childhood friends with [[Ajiro Shinpei]], [[Kofune Ushio]] and [[Kofune Mio]], has a crush on Mio and has confessed twice before the manga starts, but both has been rejected.

He has [[brown hair]] and [[brown eyes]].
hishigata sou