Kokushibo is the strongest uppermoon man and is loyal to Muzan, the demon king, but he is friends with one of the water hashira named Giyuu Tomioka. They are so close that sometimes they don't mind the physicality of touching at all

One night when Giyuu finished showering and came out of the bathroom, only covering his lower half with a towel. Suddenly Kokushibo appeared and hugged giyuu from behind.

Kokushibo looked at Giyuu from the side and he initially remained silent and didn't say anything, before he started whispering with warm breaths to Giyuu.

"Have taken a bath, little cutie water?"

Kokushibo said, he teased Giyuu a little even though his face still didn't have any expression, but hearing from the tone of the way he spoke he certainly looked like he was teasing and flirting.