Sakura's 7 Mysteries???

I was studying last night and I heard a faint crying sound. Like someone was in trouble??? Σ(°△°|||)︴Does the Sakura House have seven mysteries I am not aware of?! Please tell me because I cannot concentrate in studying because of that sound!!! (;;;*_*) I am worried that it will be the same thing tonight so I do not want to be alone.

( Texts to Yachi, Bokuto, Kuroo, Tanaka, Kenma, Tsukishima, Nagisa, Jun )

[ooc: Hinata sent the messages at around the time of this journal entry because he didn't want to sleep in his room tonight.]