Peter Grill and the Philosopher's Time manga volume 10 features story and art by Daisuke Hiyama.

Master swordswoman Tigra, Peter Grill’s former teacher, has recruited him for an important mission. She’s got to win back her dojo sign from the terrible Perverted School, who use their sex appeal to target the weak spots of men! She’s challenged them to a tournament, and while she and Peter are fighting side by side, she’s angling to use his seed to make sure her dojo never loses again. Can Peter resist her, or is he hot for teacher?