Revenge by Zile Elliven

It’s all fun and games until someone loses a shirt.
Specifically Haruka. Eli is just as possessive of his boyfriend as Haruka is of him, but some things are just intolerable. No one should see Haruka naked, ever, except Eli, of course. The sacrifice hurts, but his favorite hoodie will do the job even if that means it’ll have to be replaced. Of course, Haruka knows exactly how to get his mind off the grievous loss.
And if they manage to get in a bit of revenge against a certain trigger-happy professor, then that’s good too.