Kageyama's love for Hinata, and it's affecting their volleyball, so Hinata agrees to help him. Very cute.
Everyone thinks Kageyama and Hinata are dating-- except they aren't, are they? Well, now they are.
Kageyama seeks advice about his crush from his teammates.
Hinata confesses to Kageyama only to be turned down. Hinata doesn't want to burden Kageyama, so he tells him that it was a misunderstanding.
Hinata and Kageyama find that the sound of Kageyama's heartbeat calms Hinata down before games. Things escate a bit. Romantically.
Kageyama accidentally ingests a love potion and the first person he sees is Hinata... But not really of course.
Hinata and Kageyama are dating, but Hinata starts to doubt Kageyama's feelings.
The team goes to a festival. Kageyama and Hinata go off together while Kageyama drums up the courage to confess.
Haikyuu!! - Kokoro Control (Doujinshi)