[TOMT][Novel] Looking for a webnovel i read a few years ago

It is korean novel and I read it as machine translated that time, Mc (sorry I don't remember the name) is a blue collar worker in a factory, one day he get a system panel (i don't remember how he got it), the system provides him a daily quota of specific tasks that rewards with him points/credits, the points can be used in the system shop to attribute increase/hair growth/charm/increase the girth and length of his pecker, from what I remember mc at that time had only completed tasks releted to fitness and completly transforming his body from unathletic to mascular body and some task like reading a book in a week, the novel provided exact weight loss of mc (something between 65 to 72), to do the fitness tasks he had joined a gym, mc meets the gym owner's daughter, as time goes on seeing mc's determination and transformation the gym owner's daughter falls for him, second love interest is a waitress who have a hobby of gaming/live streaming, third love interest was one of female workers from his factory who was very popular but due to Mc's transformation she became less popular, the most distinct part of this novel i remember is a note/notebook that tell some future to Mc, Mc purchased it from the shop and it shows three time (sorry if i'm maybe wrong about th count), he uses this to save the gym owner from scam, wins lottery to help the waitress's mom with surgery money, and saves the female worker from suicide, later in the, mc had both parents and one or two siblings, system had no voice or penalty for not doing tasks, mc stayed in the factory even until he got slightly rich and athletic (until the chapters I read). And yes it had R/18 scenes.

I have been trying to find it for days.

Please help me find this novel and Thank you.