Hito wa Naze Hataraka Nakereba Naranai no ka
人はなぜ働かなければならないのか
Kousuke has spent ten years accompanying Tomonari-senpai through high school, college, and into their current jobs at the same company, believing their bond is sufficient. One evening, he uncovers two surprising truths about Tomonari that completely alter his view of him.