After spending some time in Shinichirou and Nanami's place, Sora and Sunao come across a mysterious cosplaying bandit known only by the number 416. He claims that he has come to take away something precious from Sora. Meanwhile, Sora and Sunao meet Chris, who works at the nearby church. While he seems harmless, he begins to spend more time with Sora. To top it all off, Sora begins to realize that there are times when he and Sunao are mysteriously in bed together. He already knows about Sunao's connection with his alternate personality Ran, but could that mean he has his own alternate personality as well?

[taken from Wikipedia]