a bit long but here is my analysis

so after this last update, I re read the beginning again. I must say I don't think Kurose lied. I think he genuinely loves shirotani for himself and that in the end it's the reason he wanted to cure him. I explain.
At first, when he met Shirotani, he saw that he had mysophobia, and when the opportunity was given, he was kinda weird and pushy to help shirotani cure his disease. He asked they become friends and I really think Kurosuke planned to keep it that way, just help shirotani because of what happened with Nishigaki.
BUT during that time, shirotani was just such a precious cinamonroll, kurose kun couldn't help but like him more and more every weeks. The proof ? HE ACTUALLY CUT TIES with shirotani when he try to kiss him because he feel he has messed up, EVEN TOUGH SHIROTANI ISN'T CURED AT ALL. Why's that ? Because being in love with him, he think he will mess up at some point and betray Shirotani's trust.

My point is that at that time he felt his desire to help someone like Nishigaki to lessen his guilt or whatever it is that he has, wasn't worth sacrificing the truth Shirotani had for him, because Kurose liked him but at that time they had a patient-doctor relationship.

But in the end, he couldn't stand being away from Shirotani and when he confess in chapter 8 he says again that he will cure Shirotani, this time with a very determined look and while saying that he wants to stay by Shirotani's side: http://www.mangago.zone/read-manga/ten_count/mf/v02/c008/20/

So I feel that he didn't really lie. I think that even if at first, he wanted to help Shirotani because of what happened with Nishigaki in the past, it soon wasn't the real reason anymore and that in chapter 8 it really became the fact that he was in love with Shirotani and wanted to kiss him and such, more than anything.


Also I can understand that Kurose don't want to tell the person he loves that at first he had ulterior motives he isn't proud of u_u (be brave kurose ) Even more since it will involve betraying Shrotani's trust in Kurose and Kurose never want to betray the trust Shirotani has in him. Never. I think it's the thing he want the less in the world.