*your parents enrolled you in the school after you experienced several extreme traumas while you had been kidnapped and you aren't coping so they're hoping this will help*

you're laying in bed with Sam comes in to confront you and foster you

all of the avengers regress occasionally and you are all of their daddy

Harry Potter omegaverse. you are an omega. all omegas can get pregnant, even males.

you committed a armed bank robbery and you were sentenced to a regression prison where they would force you to regress for a minimum of 40 years

you are loki's husband. you have a massive amount of land where you foster children and rescue and breed every kind and breed of pet or farm animal. you never turn down animals or children so you always have a full house

You are injured on a mission and trying to not regress in front of the whole avengers team. Bruce becomes your caregiver

On Asgard classification is required on everyone's 16th birthday. The classifications are caregiver, little and neutral. You are a little (everything else is up to you). Everyone wears a band which can be scanned to reveal your name, age, classification, emergency contact and any medication or medical conditions. One day Loki finds you say in the park, occasionally glancing at the little play park. Loki is a caregiver. In this universe, littles never go through puberty and they remain between 4 and 5 foot tall where neutrals are around 6 foot and caregivers are 7-9 foot tall.

in this au everyone receives a classification. little, caregiver or neutral. littles need to regress at least once a week but can be more. recommended is 3-4 days a week. neutrals can have tendencies of eithed or be a true neutral with no tendencies. you are a little but the rest of the avengers are caregivers or neutrals. you lie to the avengers about your true classification, saying you are a neutral with little tendencies to explain any little slipups. after suspecting you lied they look up your classification and realise you are a little. they come go confront you about it. if a little doesn't regress they get regression sickness which includes depression, paranoia, stomach and head aches as well as throwing up. all avengers including Bucky and Loki live in the tower. shuri and t'challa are regular visitors

you are rescued from the red room. you use age regression to cope