Kageyama (@gilove2dance) and Hinata (@incaseyouart) from the anime Haikyuu.

An interesting combination of costumes at the Ottawa Geek Market back in April: the human muscular system and Attack on Titan’s Mikasa. It works for me, though!
Edited: the human muscular system is apparently a colossal titan from Attack on Titan. The more you know! Not such an unusual combination after all!