beta
I think it is not only because Yashiro is afraid of Doumeki getting hurt, but deep down Yashiro is a "straight" person, as in, he thinks that leading a good, normal life is better. He has a very unfortunate life, and although he said he accepts it, I think he still wanted to be saved. In one of Sensei's note, he had an inner thought "why can't I be his (Doumeki's) sister", which I translated to "why wasn't there a person who cared for me enough to beat my step-father to death". He also genuinely thinks being a yakuza is bad, although he doesn't judge (which makes him a very respectable person).
So, he fixed Doumeki's relationship with his family so that Doumeki has a house to come home to, and insisted not to bind him with the sake-exchange. I think he let Doumeki stay with him until now only because he found Doumeki cute – or to be more exact, had begun to fall in love with him – yet unconscious about it. The moment he realized his love for Doumeki and that Doumeki could be dead due to "playing yakuza", he just did not have any more reason to let Doumeki stay.
Which is more heartbreaking to see how kind-hearted and strong Yashiro is T.T
During their sex, he said "don't break me", but I think it was too late. He knew fully well that admitting his love for Doumeki would break him, and having a gentle sex with him would break his last façade of "I'm okay with my life".
I can't wait to see how Sensei would tell us about Yashiro's life after all these commotions end, because I don't think he could go back to live his life like before.
Sigh. It's so painfully beautiful.
I worship Yoneda Kou with all my heart.
Yoneda Kou-sensei drew a sexy Sakuma?
I demand to see it!!!!