When his mother's younger brother and his wife decide to invite him to live with their family, his life takes a turn. But it is not going to be the normal family life he is imagining himself. What is the "terrible" secret that lead his parents to break the bonds with his aunt and uncle? What could be the true nature of his cousin, Shion? And last but not least, will this "terrible" secret eventually get Yanagiba too?
NOTE: There were two 190 published and which was a mistake. The publishers corrected this mistake just after 231 and so they published 233 after that. So there was no chapter 232.