A SAIYAN AND HIS BAD GIRLS
DISCLAIMER: I do not own Dragon Ball Z or Prison School. The former is owned by Akira Toriyama and its respective anime companies, while the latter is owned by Akira Hiramoto and its respective anime companies.
Chapter 17: Conclusion
In the end, it came down to a swimsuit race. Broly and his girls, along with the boys, won. The girls were freed, and Kiyoshi did something really dumb and landed himself back in the school's prison. Mari's father, the principal, ended up telling everyone that the school prison was initially built because of him and his terrible behavior back when he was a student. Broly and his three girls went to another world, got married, and lived happily ever after.
END.