You really read it thoroughly. I feel so happy to know that ^-^ There's a probability the scientist has real reason why he want them to join him and at the same time it's possible he hasn't too. And if he is, maybe it's a right reason or otherwise. The only thing that prohibit Sho from sign the agreement is his friends so something like your guess is not impossible to happen(like you said he's a mama bear so his friends should be his top priority now).
There's sure a lot of questions but I only can say 'probably'... ^^" I'll do my best for the next update! Thank You SO much for reading and commenting!