MTL - Kiss Husband: Sweet Wife Is a Little Crisp - Chapter 17 Where is the money coming from?

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

I, Hyoudou Issei, am a 2nd Year High school student and my age is equal to the number of years I haven’t had a girlfriend. And, someone like me got a girlfriend! I’m sorry buddies, I will walk the path of becoming an adult before you guys! – That’s how it was supposed to be, but why did I get killed by my girlfriend!? I still haven’t done anything yet! Are there no Gods in this World!? And, the person who saved me is the most beautiful girl in my school, Rias Gremory-senpai. I learned the shocking truth from her who isn’t a God but a Devil. “You have reincarnated as a Devil! Work for me!” Lured by Senpai’s breasts and treats, my life as a reincarnated Devil began. So the “Academy×Love Comedy×Battle Fantasy” starts here with just aggressive and worldly desires!

After the divorce, the ex-wife disappeared for four years and unexpectedly gave birth to a pair of twins! Upon reuniting, Third Young Master Shen continuously pressured her into marriage, but the ex-wife's heart was tightly shut. The soft and adorable daughter was worried, saying: “Uncle Shen, why don't you kidnap me and threaten my mom to marry you?” Clearly, she is his biological daughter. The arrogant son, on the other hand, specializes in ruining plans, revealing someone’s embarrassing photos: “If you keep pestering my mom, I’ll send this to the parent group!” He's clearly out to get his dad!

Unique skill ‘creditor’ which can bet with its debtors on the unpaid debts.

And the ability to take skills and stats!

Kang Yoo-sik’s chance to start a new life at the Hunter Military Academy.