"Now this, kids," Satoru Gojo grins, a lock of dark hair in his palm, "is how you brush the hair of a perfectionist."

"Satoru," Suguru Geto chuckles, his head in Satoru's lap, his eyes happily closed, together with Mimiko, Nanoko Megumi, and Tsumiki, "teach them properly."

Dramatically, he gasps. The girls giggle. "I am!"

It had just been the two of them together in the bathroom, Gojo brushing his husband's hair like every morning, then the kids barged in; now he's teaching them.