College student Kanata (Dom) loves his childhood friend Minato (Sub), who is five years older than him. However, when he was a child, he witnessed his own brother and Minato playing...? Twenty years' worth of love and obsession intersect in this extra thick Dom/Sub universe!

(Source: Shinshokan, translated)

Note: Chapters 1 and 2 were previously published in Volumes 2 and 3 of "Collar me Dom/Sub Universe Anthology (Collar me Dom/Subユニバース アンソロジー)," respectively.