Bokutachi Wa Asu Ni Mukatte Ikiru No Da
Complete | Zaou Taishi | 2005 released
It's cute and fluffy, but predictable and mild. If you're looking for novelty or hardcore, look elsewhere. (Though the art is really beautiful.)
Secret XXX
Complete | Hinohara Meguru | 2016 released
Shingakkou - Noli Me Tangere