Kumogakure Kuro is a modern day-ninja.

Kuro's assignment is to infiltrate Kodan High School.

Kuro sets a trap and catches a high school boy named Eita; upon returning home, Eita encounters Junna, who wants to borrow his drone; Eita agrees to let her if she can find the blonde foreigner.

The confrontation between the Foreigner, Suzuki and Hibi continues; Junna's stepfather arrives at the location of the conflict and begins to yell at her for being outside; the Foreigner attacks him.

Kuro goes to take his placement tests at school and meets Noguchi, who is there for extra lessons.

After coming to Eita's aid in a conflict with some school delinquents, Kuro makes his way to the school's boiler room where he confronts the director; the defeated Noheji requests Kuro's aid in fighting some students from Yankii High.