Konya mo Nemurenai
Barely yaoi (just one chapter and not even anything steamy). It's memorable so it's not a quickie but it's not anything amazing either. It's just alright.
Tenchou, Koi Desu.
It's so cute and the characters aren't dense and making misunderstandings. It's doesn't have a lot of sex but I really love this for the couples <3 (specially the second one)
24 Jikan Eigyouchuu
A quickie but damn that lollipop scene is unforgetable
Sakende Yaruze!
The only reason I'm not giving this 5 stars is for how messed up it got in the end. The father and son relationship was going really well (it was super cute how protective of the father the son was) and then it shattered and they kinda went from being father/son to distant relatives. However, it's still a really good read.
Kami-sama no Ekohiiki