http://www.at-sakura.net/ntr/brand/128/index.html
https://www.getchu.com/soft.phtml?id=1320920
https://www.dlsite.com/pro/work/=/product_id/VJ01004044.html

https://vndb.org/v54575

Base +27

Linear story with only bad end. TLDR MC is a delinquent who fights bullies, one day Principal's son who is a bully gets in trouble and he pins his son's misdeeds on MC and threatens MH to kick MC out of the school if she doesn't obeys him lmao, self explanatory plot, there is no good ending, the early only option where she isn't corrupted is one where she rejects the deal but her realtionship with MC is damaged.

Base +22