From Good Girls Scan BL:

Shiki and Yamato are childhood friends, living in a village in Yamatai. Yamato, who always protects Shiki from bullies, has a personality as radiant as the sun. Furthermore, he unknowingly trifles with Shiki's heart with his bright nature. “My heart beats so loud when I’m next to Yamato…” When Shiki realizes his feelings toward Yamato, Yamato also notices himself falling for Shiki’s beautiful crimson eyes. However, fate tears the two apart, and they never see each other again. After ten years of holding onto his feelings for Shiki, Yamato reunites with a certain “man”...