The end of youth ~Ai no, Uta~
Complete | KONOHARA Narise,MIYAMOTO Kano | 2000 released
Michiru Heya
Complete | nekota yonezou | 2006 released
Kyuuso Ha Cheese no Yume Omiru
Complete | mizushiro setona | 2006 released
This had a really slow build-up, but just kept getting better as it went along. Definitely worth keeping with it.
Koigatari Raiseihen
Ongoing | Kanzaki Takashi | 2008 released
Caged by Love, Shackled by Honey