Synopsis: Boku wa, Yuri na Onee-chan wo Ouen Shiteimasu

I'll Cheer On My Yuri Sister / ぼくは、百合なおねえちゃんを応援しています Mio cares about his older sister quite a bit as she's quite shy and can't do much without him. When a transfer student joins her class, he can't help but try to help her make a friend.