I agree. Mono is no Tsundere. He's a grown adult who always thinks of angel duties and is a workaholic. Someone had explained Mono's actions in detailed here: http://www.mangago.zone/home/mangatopic/2877585/
Also you can notice how different Mono's expression in teasing Baron than when he teases Ginger, Monday or Lego: http://www.mangago.zone/read-manga/heaven_hell_roman_company/uu/heaven_hell_roman_company-chapter-45/20/
I did read it before, not agree with it at all. And again, the fact that he did molest Lego sexually even if it's for help him or doing his job is wrong! And yeas I will say Mono is a player. He tease and play with Lego and Baron a LOT. No matter what, if he didn't feel anything for Lego, then he should not have touch him in sexual way!!! And I do argue he did felt good not less then Lego and care about Lego not less then Baron. His actions speak more then his words.
Momo-senpai why don't you like Lego(??)-kun, he is beautiful, and he wuvs you, people see a connection. And Manwdnwshbdfejfn,(I hoenstly dont know how to spell his name, Monday's seme) should just like (〜 ̄△ ̄)〜 How I say this wightout creting heat. He should like chill on Monday for like a min, at least when he's recovering, because I think him being there is making the memories there, but there being forced to stay back