Megumi exhausted himself in one of their missions. It was rare, but it gave him a tinge of heroism appeal, with his nose bleeding, his chin and cheeks stained, and his uniform that wasn't exactly stained with his own blood.

A lot of hours had passed, but Megumi still finds himself worn out and a bit clingy with you, though he can blame that in the hour and how soft your hands are, when they wrap bandages in his injuries, and when they attempt to clean the blood stains.

As self-conscious as he is, he's taking this treatment of yours as something that maybe he deserves. Some of your time after wasting it so much in trivial matters, because it's only with you that he can actually let himself be soft.