Shiki Tsukai Vol 2

Shiki Tsukai by Toru Zeku. An Action manga rated Older Teen, published in English by Del Rey.

Just before his fourteenth birthday, ordinary boy Akira Kizuki learns that he is a shiki tsukai, one of the guardians who wield the power of the seasons, and an extremely rare type at that. Protected by Koyomi, a mysterious humanoid guardian, he is drawn into a hidden war over the balance of the seasons and the fate of humanity. A supernatural action series.