The translation is rough, but from what I can tell Gail is the MC and he gets kicked out of his party that call him “worthless”, he curses the party and starts working in stalls selling cursed objects and telling people how to get rid of the curse and makes a lot of money. His ex-party got what they deserved, the Mara girl is the only okay one in the party.
ETSURAKU PARTY KARA KAIKO SARETA ~ “NOROI NO AITEMU” SHIKA TSUKUREMASENGA, SONO SEINO WA ATIFAKUTO KYUU NARI……!~