Of the Red, the Light, and the Ayakashi

On the outskirts of Utsuwa City is a shrine, where a boy named Yue was born and raised. One day, led by his childhood friend Kurogitsune, he goes to play at the big winter festival. Brilliantly lit paper lanterns, noisy human figures. Seeing the outside world for the first time in his life, Yue comes across two mysterious boys. When he returns to the mountain he informs the shrine mistress Mikoto of what happened, and she tells to prepare for "The Meal."

[From rikoren website]