Renai Tsuu summary: When stoic Mizusawa, a janitor, saves businessman Aoki from falling down some stairs, he gets a friend for life! Aoki is always tracking him down at lunch time just so they can eat together. But Mizusawa isn't sure how he feels about Aoki... This is a series of six. The order is: 1. Hada na Ue no Renai Jijou 2. Zaiaku wa Hada no Ue ni (same characters & issue but different plot) 3. Zaiaku wa Hada no Ue ni-Hada no Ue ni Furu Hana* 4. Renai Tsuu 5. Renaitsuu-Akka-* 6. Pillow Talk + Holiday* (*) indicate djs. 4 and 5 are spin-offs featuring Aoki and are contain events from Zaiaku from Aoki's perspective. 6 features both couples.