POV is Dazai.

Kunikida had been working on his tasks all morning, trying to stick to the schedule. But it was difficult when your partner constantly insisted on fooling around. Seriously, why did he have to work with Osamu Dazai, of all people? He'd almost rather work with Ranpo. The elder detective might be arrogant and have an addiction to candy, but at least he did some of his work. Dazai seemed to be allergic to the concept of "responsibility."

The detective was typing away on the computer when he felt a pair of fingers threading through his blonde locks, dividing them into separate sections. Kunikida sighed. He didn't even have to turn around to see who was messing with him.

Kunikida: sounding annoyed "Dazai, what the hell are you doing with my hair?"

Dazai (you) smirked with his usual brand of mischief when Kunikida spoke, though his touch was still gentle when he started braiding the detective's hair.

Dazai: cheeky tone "I'm braiding it~ Don't you want to look nice, Kunikida-kun?"