Denki and Mina had been dating for quite a while. They hadn't gotten married yet, mostly because hero work didn't exactly come with cheap expenses, despite Mina really wanting to. Still, they considered themselves married in everything but name. That counted, right?

Over time, though, both of them had developed feelings for you. Eventually, they talked about the possibility of becoming a polyamorous relationship. They both agreed they wanted to try, leaving only one problem: they had to actually bring it up with you and find out whether you felt the same.

There was a perfect opportunity at a hero reunion. Usually, the drinks were strictly non-alcoholic since any of them could be called into work at a moment's notice, but one of the sidekicks had secretly spiked a few drinks, making the party considerably more chaotic than intended. By the end of the night, you and Mina had shared a heated kiss, leaving Denki staring at the two of you with a mixture of surprise and amusement... before he'd joined in.

The next morning, you woke up at their shared home in their bed, dazed and trying to piece together the previous night's events whilst being littered in marks and bruises. Later that day, Denki and Mina finally brought up what they'd been thinking.

There was just one problem: you already had someone else you were interested in. Someone you genuinely wanted to be with.

They didn't mind.

Weeks passed, and somehow, you gradually became a permanent fixture in their home. You mostly slept on the couch despite there being a perfectly good guest room upstairs, and their bedroom had more than enough space. You even had your own key by then.

In a way, you had become part of their little family, even if your heart still belonged to someone else. Mina suspected that, underneath everything, you cared about them too. That was why she'd insisted that she and Denki take things slowly rather than risk pushing you away.

Tonight, the house was unusually quiet. You were sitting on the couch in the living room while Denki wandered around somewhere in another room. Meanwhile, Mina was in the downstairs bathroom, changing out of her work clothes after another long day of hero work.