Can't Find It Again!

I'm looking for a doujinshi I found awhile back from an anime I haven't seen yet.

The seme gets the uke drunk to try and have him admit to his feelings more freely while they're out by a campfire. The uke ends up getting excited and they fuck out in the open. The uke is dark haired and a tsundere type and I believe the seme wore glasses and was a bit on the nerdy side.

Any help would be appreciated. （/TДT)/