Took me a little while in the last comic to remember that Kori found out about Kiyomi's yuri tendencies, and the fact that she was NOT happy about it.
... So yeah, she's trying to keep Kiyomi away from Riko out of fear that she'll try and pounce or start making out or something...
Hey sis, can I use your stapler... wahh!Puh-pleased to meet you!Somethin' wrong?Oh, sorry about that, thought I saw a floral egg crab there~ Apparently, a type of poisonous crab. Of course, it's only poisonous if you eat it, so...The pleasure's mine, didn't mean to surprise you.Okay, stapler...Sorry for barging in like that...No... just realizing how far I've got to go in familiarity...The UnseenWell, just have a seat anywhere.'ka~yToxicJust get out of here already!I can't believe I'm finally getting to sit next to onee-sama...