The Time a Gangster was Reincarnated as Ranmaru Mori

Summary

Hajime gets the tables turned on him when his subordinates rise against his rule, and when he wakes up... he's in another body?! Stuck in what seems to be some super-detailed period drama set, the first thing Hajime should do is leave, but good luck on that when some guy pushes him down, takes him home, has his way with him, and makes him his page - the guy happens to be Nobunaga Oda!