It looks like a case for a Thermos or such so until the others took it out I don't think anyone thought about it. Though with a school like that they all ready have 20 different rumors of what's inside anyways. XD
If he can’t have his body back, then he should dye his hair and work out like crazy! It’s kinda awkward when you think about how the seme is kissing the empty shell of a dead guy ....
The drama in this is what you would expect of kindergarten kids...