Who does neji kiss?

In Road To Ninja: Hinata. He pervs on her in the bathroom scene.In Naruto SD: Hinata. He's obsessed with her.

In the fillers: Hinata - watch episode 306.

In the original manga - unknown. Still, it's implied that he loves and cares about Hinata, especially when he sacrifices himself for her.

Source: A person who's seen the entire series.