I remember one scene, maybe it was an extra chapter. So uke and seme was arguing because of some trivial stuff, and one of them says: "No sex until you say I'm right" or something like this. But uke gets horny and want to seduce seme. So he tries the naked apron, then he wears his seme's shirt and no underwear, he drops something and picks up while his butt is shown to seme.

Anyone remember?

There was a scene a lot like this somewhere in Brother by Ougi Yuzuha — it was pretty hot and it's a smut manga so it's probably not what you're looking for if you remember something more tame / less graphic.

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Yes, that's it! Thank you!