My Little Sister Can't Be This Cute 2

Kirino Kousaka has returned to Japan after time in America, where she was training for track and field. Her relationship with older brother Kyousuke remains strained, partly due to his previous efforts to persuade her to give up her training and return home. Adding to Kyousuke's concerns is a cryptic message from Ruri "Kuroneko" Gokou, a junior and friend of Kirino's. Kyousuke navigates his relationships with Kirino and their friends while also trying to help her and himself come to terms with their feelings.