Regarding Reincarnated to Vampire-san ~I’m the world’s strongest cheat~ (Associated Names)

I have reincarnated into a different world as a Vampire Egg. Moreover, bishoujo? Nono, bishounen? I suck the blood of monsters while growing up in the dungeon, steal their abilities and level up. I gather【Titles】and evolve. I encounter a hikikomori sage (former hero party member) and become the strongest. Completing the monster picture book, creating…