Heyyaaa~ I remember reading that too but well I don't know whats the title.
So hoping someone? Onegai!! Someone tell us
I think it might be Smurf's World.
http://www.mangago.zone/read-manga/smurf_s_world/
Sorry wrong one!
http://www.mangago.zone/read-manga/elektel_delusion/ is it this one?
I think it's the one where the uke ran away from home and began living with the seme(who's broke) and they eat rice with mayo???? Is this the one you're searching??
the sister caught them but they're not totally kissing but. ARIGATOU GUSAIMASU (｡•ᴗ-)✧
Thank you TTwTT but its not elektel delusion ..
There is a manga i remember , its yaoi and i remember two boys kissing and was shocked because the sister saw them kissing in the doorway of the house btw before the sister saw them,she can't get in the house so she used a shortcut in the house and saw them kissing in the doorway and she approved ε=ε=(ノ≧∇≦)ノ the sister is a fujoshi hahaha
If someone knows what yaoi manga it is, please tell me ╥﹏╥ thank you so much!!