Suggest a scenario, please

[absp2006]

I'm a young guy that wants to have some fun tonight.

I got me:
- 2 15-ft rope
- a thin 6-foot rope
- ring gag with attached nipple clamps
- 1 clothespin
- anal beads
- enema kit
- vibrating bullet
- blindfold
- Velcro cuffs
- 4-inch butt plug
- watersports as long as no one else smells it and I don't get anything else messy
- ...and common household items.

Constraints:
I'm limited to only my room and the bathroom next to my room. Avoiding noise 'cause bathroom light's turn on a loud fan.
Low pain tolerance. Too much and it's a turn-off.
I would prefer a position in which I will be unable to grind my dick because the session becomes unenjoyable after I cum. (Tips on how to fix that are welcome)

Aditionally:
Will be starting this in less than 5 hours.
I won't be doing overnight, but leave overnight ideas here.
Bonus: I want to preserve my cum and use for next session. Those ideas also welcome.