When would tu say Ritsuka falls for Soubi?

When Soubi first kissed him (in the 1st ep), with tsundere boys it's actually quite easy to tell when they really fall in love, in combination with some fangirl wishful thinking...

Id say when soubi first gave ritsuki a kiss

i'd say around the time soubi left to get the picture and he felt how much he missed him not being there!!! ♥

I think Ritsuka starts to fall for him when he starts thinking about him whenever there apart!

o when he gets mad at Soubi when hes hurt o keeps things from him.

when he first sees soubi...

I would say I knew it would happen. I mean who cannot fall in amor with Sobi :D