White Flower is the the fourth and final game in the Sukisyo series.
Taking place a couple of years after Rain, many changes have been made to the school. Not only is it no longer an all boys school, several of the former students are now working as teachers while others move onto other jobs. Sora, as one of the teachers, has been living a fairly normal life as he takes Minato's place as teacher. However, he realizes that it won't stay normal for long when he sees that Sunao, who he has not seen since the events in Rain, reappears in one of the halls. This game finally wraps up the story between Sora and Sunao and ends their conflict with Professor Aizawa. Depending on the player's choices, Sora can either end up with Sunao, Nanami, Hiromu, Matsuri, Soushi, or Minato. There are two hidden endings in this game. The Yoru/Ran ending is received when achieving the true ending, while the Kaito ending is obtained when all the CGs are collected.