RBD-772 — I'm A Useless Employee And I'm Going To Ruin My Female Boss Who Is Younger Than Me And Everyone Admires Her! Saeko Matsushita

Yamazaki is a man who has been overtaken by Saeko, a junior office lady who joined the company later. He never faces his own incompetence and feels ill will towards everything Saeko does, even though she is a good person. And then, the stress he can no longer bear explodes...