Sobiwaku Zero no Saikyou Kenshi: demo, Noroi no Sobi (Kawaii) nara 9999-ko Tsuke Hodai

In a world where your value is determined by the amount of equipment slots you're born with, our young protagonist Noroa, who dreams of becoming an adventurer has... zero equipment slots! However, he's able to equip 9999 items only if they are cursed?! His adventure begins a fateful day after meeting a mysterious doll and acquiring a cheat-like cursed sword!

(Source: MANGA UP!)