Mark

"You see, some people are born hardworking, and others aren't. I fall into the latter category."

The main protagonist, he is a high school student who lives a simple life with his little sister, Rin, and his only friends, Lillian and Lukas. As winter approaches, he wishes for something that could warm up his wintery, cold days: love. However, he tries hard to forget a secret from his past which made him suffer.