The Story of Being Deceived by a Gold-Digger Gal and Becoming a Cuckold Masochist

You're a university student who gets randomly approached by Nanase, a gal character, and somehow end up dating her. You find yourself catering to her every whim—buying her clothes, giving her spending money—while she showers you with affection and sweet words. One day, a friend tips you off about her secret social media account, where you discover a devastating truth: she has a "main boyfriend" she actually cares about, explicit selfies she'd never show you, and posts bragging about extracting money from you like an ATM. Despite the betrayal, you can't let go of her smile. As you increase your friendship level, her true nature and real relationship gradually come into focus—a dark exploration of manipulation, delusion, and the painful cost of willful ignorance.