Not sure if related... but This is a shounen ai body switch http://www.mangago.zone/read-manga/inner_beauty/.
Wait, that was his s. Friend that switched bodies with his crush. Try this one instead:
http://www.mangago.zone/read-manga/geinaru_tadaima_ire_kawarichuu/
OMG!!! You beat me again Gah!! ε=ε=(ノ≧∇≦)ノ
Thank you, guys, for the answers. None of the above is what I was looking for, but I'm not really sure. Anyway, your recommendations are nice. Gonna read it anyway. Thank you again
Sure! You’re welcome (⌒▽⌒)
Here is a one shot body swap gem: http://www.mangago.zone/read-manga/kuro_ouji_no_iinari_ni_naranai/uu/cd46cb907984eda6a11c3931f68dcaa3_chapter-6/pg-1/
Also try these tag searches for more:
http://www.mangago.zone/tag/Body%20swap/
http://www.mangago.zone/tag/Body%20swapping/
http://www.mangago.zone/tag/Body%20switch/
http://www.mangago.zone/tag/Soul%20switch%20/
http://www.mangago.zone/tag/Soul%20swap/
http://www.mangago.zone/tag/Soul%20swapping/
(●'◡'●)ﾉ
Was there a manga where the uke and the seme switched bodies and the seme is lusting over his own body because it was his uke inside it?
Maybe I'm hallucinating...