あらすじ
They've already had their bodies swapped like musical chairs, had their ages changed at random and experienced their deepest desires taking control of them without warning, but if you thought Heartseed was finished with Taichi, Iori, Himeko, Yoshifumi and Yui, you've got another thing coming! Now there's a new affliction going around, and the name of this peculiar bug is emotion sickness. As in, suddenly your emotions jump out of your body and sick someone else!
あらすじはAniListより（英語）。