Yokkun

Yokkun is arrogant, insensitive, and eager to embarrass Yutarou. He repeatedly emphasizes the difference between Yutarou's old ambitions and his current life working at the family bathhouse.

His mockery extends to the bathhouse itself. This proves more provocative than insulting Yutarou personally because Yutarou retains genuine pride in his family's business despite being dissatisfied with his own circumstances.

Yokkun behaves with the confidence of someone who expects little resistance. He treats his status as a customer as additional justification for disrespecting the employee serving him.

Yokkun has no established assassin training, supernatural abilities, or specialized combat skills.

Whatever ordinary physical confidence he possesses is insignificant beside the professional killers who populate Sakamoto's world.

His encounter therefore functions less as a fight than as an example of how effortlessly someone with Sakamoto's abilities can control an everyday confrontation without openly revealing what he is capable of.

Yokkun appears during the bathhouse outing and recognizes Yutarou from their past.

He quickly begins ridiculing Yutarou for having returned home after leaving with larger aspirations. The harassment worsens when he begins insulting the family bathhouse as well.

This mundane conflict occurs alongside Yutarou's secret realization that one of his customers is the legendary Sakamoto, creating simultaneous pressure from his personal embarrassment and the temptation of Sakamoto's bounty.

Sakamoto's presence prevents the confrontation from developing into anything more serious while keeping his extraordinary capabilities largely hidden from the ordinary people around him.

Yutarou is an old acquaintance whom Yokkun mocks over his failed ambitions and return to the family bathhouse.

Monchan accompanies Yokkun and participates in the harassment.

Taro Sakamoto is present during Yokkun's confrontation with Yutarou and quietly prevents matters from escalating.