I think it was one shot..man was getting married and is going to jewelry to buy ring...then [I think it was owner of shop,for now let's call him Seme because that's true] Seme talked to him and somehow they had [you know what I mean]...Uke found himself in love with Seme ald leaved his Bride...at the End Uke is naked with jewelry if I remember right...it's not really helpful but I hope you will get this >.<

Koibito wa Hatsujouki ?

Yes,that's it..thank you ^^