Yuusha Izoku

The hero who defeated the Demon King and saved the world has died. Gil, a half-elf who carries his blood, heads eagerly to the funeral of the "father he's never met" after hearing about an inheritance, but...?! The womanizing hero's love-starved children collide in a ruthless, blood-soaked inheritance battle! Will it end in a mountain of corpses... or something else entirely?! A rare and outrageous post-adventure isekai story!!

(Source: MANGA Plus)