It's this story..
http://www.mangago.me/read-manga/doushiyoumo_nai_keredo/
but the scene you mentioneed, is here
http://www.mangago.me/read-manga/tight_rope/an/tight-rope-chapter-5.html
finally, i have been searching it every chapter of doushiyoumo manga but i cant find it, so its actually in tight rope manga ... thank you so muchhh ^^~~
I remember because it's my favorite superb core scene. (▰˘◡˘▰)
Just in case you still don't know, there're some extras here too.
// Extra 1 - Night of sake, Ch 5 of Natsume Isaku Fanbook
// Extra 2 - Let’s go to my parents’ house!, Ch 6 of Natsume Isaku Fanbook
Ohhhh there is still an extra! ! ε=ε=(ノ≧∇≦)ノread it right away!!! Thank you so much xD
im searching a manga that i forgot, hope you can give me the page too ^^
the uke's father found out his relationship with the seme at the new seme's house when he visited him ... after that, the uke's father challenged them to drink and end up the uke was drunk .. the seme and the uke's father still going, but the seme a bit worried abt the uke cuz he's so clingy when drunk, suddenly the uke move and fall a sleep at seme's thight in front of uke's father