Technically Not a Sugar Daddy

(CrossPosted From Ao3)
Neither knew how it happened. Katsuki had been giving Izuku money and gifts since part way through Middle School in exchange for the green-haired boy to stay away from Katsuki, but eventually, it slowly changed to be deals that if Katsuki gives Izuku money, he had to do XYZ.

Essentially, Izuku walks up to Katsuki and asks him about some merch he wanted and Katsuki gave him the money for it in exchange for him to do various things like triple check his homework, go to bed at a reasonable hour, stop eating unhealthy food for X amount of days, etc. This didn't change when they entered UA, the two used to being subtle about this unique aspect of their relationship.

Little did they know that their classmates were more aware of their surroundings than their Middle School classmates and had begun to notice the odd interactions between the two followed by Izuku being ordered around by Katsuki.