I love it!!! It's literally what I've been lookin for!!! She's training herself and it's in a dungeon!!! I've never seen that b4 they're always with the ML cast or just time skip the hell out of it and just make them strong but this one has fleshed out characters not apart of the ml cast and not to mention she's not in a school setting??? It still has the classic tropes but it's a good read
Kaifukushoku No Akuyaku Reijou