Responses
Actually if you really think about it from Yoseob pov and how smart he is, the only reason he gave her the umbrella was so he'd have an excuse to share an umbrella with his hyung and confuse the heck out of yura. Making her wonder if he likes her or is just playing with her (●'◡'●)ﾉ But great observation
absolute power play if ive ever seen one
I've just reread this from chapter 1 to 10 and this is just my opinion so pls don't hate me :'> I think that Yoseob was trying to make up to Yura for kissing her :'> I mean seeing his face went dark for a second there just explains why he would give an umbrella to her: http://www.mangago.zone/read-manga/an_uncomfortable_truth/mf/c009/20/
Or it could just because he wanted to remind her of the kiss and make her stay away from Jaeha. Either way Yoseob still likes Jaeha the most and wants his brother all for himself ╮(￣▽￣)╭