Holy_mackrel

Love Triangle development later...but not whom you expect. So an advance warning. 
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The world's No. 1 Beloved Hunter has a secret. She's a female and second, she's a lazy know-it-all who does not want to do anything but laze around and have fun. 

The dungeons? Not her concern. The tower that marks the progress of humanity? That does not feel as important as her college entrance exam result she is failing. The only concern Nero has is to keep her identity a secret from her sick mother and to make sure she lives a calm life. 

But that’s easier said than done when one is the older sister of an S-ranked hunter as well as a genius potion maker.

Nero wants to live a calm life, but the world does not want her to live while hiding. And the biggest culprit behind her life being turned upside down is no other than her own patron - the mysterious being called ‘?’ who keeps on wanting her to fully apply her potential and to maintain her crown as the world’s #1.
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There will be romance.

The World's #1 Beloved Hunter has a secret

The dungeon boss lunged toward Nina with a roar, claws slicing through the air. She threw herself to the side, barely dodging the blow.

Its strike crashed into the stone where she had stood a moment before, splintering the floor with a thunderous crack.

Her Patron's voice echoed urgently in her mind.

[Take care of it, Nina. Quickly.]

"I can't. If I take care of it the usual way, I'll blow my cover!"

Nina hissed, rolling away from another slash.

[And if you don't, you'll be dead. Your life is more important than pretending to be a normal human.]

Not because he was wrong—but because she didn't have a better argument.

The boss charged again, and Nina ducked behind a shattered pillar. Her mind raced. Her Patron had a point.

But there had to be another way. She couldn't reveal herself, not with two high-ranking hunters nearby.

Ch 26: Hiding Something- Part 1