Ok....I need help, cus I can't remember the name of this manga I read a while back.....
It's about 2 friends that had a one night stand and they promised not to ever talk about it again so things wouldn't be awkward between them...and so years passed and they were still friends but they wanted to take their relationship further but were afraid to do so....
Both of them were adults if I remember correctly....what I can't remember is if they lived together as roomies or if one always visit....
Thank you for any help!

Question... are these friends male-female, male-male, or female-female?

[color=green]"Officially, this machine doesn't exist, you didn't get it from me,
and I don't know you. Make sure it doesn't leave the building."[/color]

male-male