Angsty BkTd+TdDk where Bk feels he *owes* it to Dk to also let him...

At least Dk is better than literally anyone else, Bk would not consider it with anyone else.
And then Shoto wants them both to spend the night in his bed with him.
But then during their first time Shoto wants BkDk to kiss and jerk each other off before they turn to him?
The fuck?
And yeah it is fucking weird! But fine, whatever, Bk will do whatever for his boyfriend.
So he and Dk start working each other and their first kiss is like lava in Bk's veins.
Wait, what?
"Kacchan, I'm sorry, I know you don't feel the same-"
"Who the fuck said that?" Bk barked, surprising both himself and DK with his words.
Bk turned to Dk, "I said you were the only one I'd be willing to share Shoto with. I guess I realized that's because you're also the only one I'd also be willing to date. So-"
"See? Isn't this much better?"
Besides this means next time they have sex, it'll be all about Shoto!