Deep Dependence

Sweet, adorable bottom: Does not relying on your brother mean you've grown up?

Old-fashioned, overbearing top: It means you're being rebellious.

Older top/step-sibling romance

An old-fashioned, overbearing guardian slowly losing control. When anyone gets close to the sweet little cupcake he raised himself, he gets so jealous he loses his mind. The more he tries to suppress it, the more it erupts...

Note: Just indulging in some trashy romance tropes. Putting the idea out there first.

Details are still being worked out.

The leads are not related by blood, and their romance only begins when they're adults.

Theme: Letting loose in moderation is good for your physical and mental health