Possible chronology: Marmelo - Hiroki and Rena have sex for the first time. Rose - Direct continuation of Marmelo. Statice - Hiroki and Rena still in the early stage of their relationship. Freesia - Mana not yet in relationship with Hiroki. Lyon - Hiroki surprised to find out that sisters know about his relationship with Rena. Mana jumps in on the fun. Viola - Direct continuation of Lyon. Azalea - Direct continuation of Viola. Cattleya - Yuna in a relationship with Hiroki. Phalaenopsis - Hiroki still in high school Dendrobium - Hiroki gets into the university, cover suggests that foursome is already complete.