Does anyone remember this manga where the mc has a rival or something he secretly admires i think or hate but one day he suddenly fells into this parallel universe ig where he falls for ml and they end up having sex but after that he wakes up in his original body and later he confesses to ml that he liked him and about this another universe in which they have sex and later they end up going into another universe where they meet their older self ans the older self are having sex in this room ans they are doctors or scientists i think and they are living in apocalypse world where they are the only one alive if i remember. Please help me find it. I didn't rate it and it ended up getting lost in my history. Don't let this one be a history please.
Does anyone remember this manga where the mc has a rival or something he secretly admires i think or hate but one day he suddenly fells into this parallel universe ig where he falls for ml and they end up having sex but after that he wakes up in his original body and later he confesses to ml that he liked him and about this another universe in which they have sex and later they end up going into another universe where they meet their older self ans the older self are having sex in this room ans they are doctors or scientists i think and they are living in apocalypse world where they are the only one alive if i remember. Please help me find it. I didn't rate it and it ended up getting lost in my history. Don't let this one be a history please.