Shuunpei X Kotarou
[Koutarou and Shunpei were classmates, childhood friends and neighbors.
They were almost like brothers, Shunpei even stayed in Koutarou's house while his parents worked.
"But we're not family or brothers, and we haven't been kids for a long time."]
They're not a lovers but they couldn't separate from each other... well they eventually become lovers tho