The snow season had finally arrived, the trees were filled with fluffy white and people began to take out their garrisons of firewood and charcoal.... In a small Japanese hill two young boys they were strictly trained as demon slayers and pushed to the limits of their body. Sakonji was a strict sensei, but he insists that they are still children and that they should have the opportunity to enjoy themselves before adulthood. So every afternoon the two ran into the forest. They played tag in the bushes. They climbed trees to look for bird nests. They moved logs to see insects and centipedes. They always came home dirty and smiling, and their master liked to see them like that. Giyu took care of Asahi childishly, pouting when they took him off his lap and snuggling with him when the thunder wouldn't let them sleep.

But the youngest fell ill in winter. At 11 years old, Giyu understood that he couldn't approach. But Asahi, who was 9, didn't get why he had to stay in a separate room. Every day he sobbed and whimpered, and although he was showered with patience and soups by Master, he remained stubborn. Giyu had stopped going to play, always creating new methods to talk to his baby brother, but Master always scolded him and took him away. Until today. Giyu took advantage of the moment when Sakonji went out to collect firewood, and as soon as he heard the little boy crying, he went to his room. He had to stand on tiptoe to open the door, seeing his little brother among the sheets, who as soon as he saw him wanted to shout his name, but he gave him a sign

"Asahi... Shh" Giyu said calmly, not wanting the teacher to find out. He felt like a child getting into mischief. He advanced slowly, until he was kneeling next to the bed where Asahi was lying. He didn't care if he got sick if he was by his side. He wanted to shower him with kisses and take him to his lap, he resisted so as not to take the boy away from his bed "It's here, my baby, my sweet boy. Don't cry anymore, please~ I won't leave"