Kiss moments that actually capture the tension are few and far between. Most fics I've read default to a high-emotion climax—like right after a life-or-death battle where they're both hopped up on adrenaline and relief. Those can work, but they can also feel like a generic release valve. The real tension, for me, is in the almost-kisses, or the kisses that happen for all the wrong reasons.
I keep thinking about this one-shot where Bakugou kisses Deku purely out of frustration, to shut him up during an argument, and it's so charged because it's not romantic at all in the moment; it's aggressive and confusing, and Deku just freezes. That messy, combative energy feels way more true to their foundation than a dozen tender, post-confession scenes. The tension isn't about whether they'll kiss, but about what the kiss even means when it finally crashes through all that rivalry and history.