Not to pick nits, but the translation says "Scissor!" when Asane clearly throws paper (and paper beats rock, so that's how she wins the game). Was this a mistake or did she say one thing and throw another (which would cause a big fight in any RPS game I've ever played. XD)
Also, I'm really coming around on this author. The stories are super simple to this point but cute and right in my strike zone, and the art is growing on me. Hope she puts out something for purchase at some point!
I loved that - a lot :) Wow that kiss was hot - I loved how her arms end up coming up around the sister on tops neck, pulling her down.
After they finish the homework, Asane should tell her older sister she will help her with her homework anytime - for another kiss :)
Given the older sister didn't seem good at homework and was really happy to have help - and given that she really liked the kiss - I think she would be totally unable to resist the offer - and be able to use it as an excuse to cover her embarrassment.
Or if the older sister wanted to initiate more kisses she could hide it by asking for more rock paper scissors - ostensibly to get homework help - but knowing she usually looses - and hoping her sister asks for the same thing :)