The Laments of a Sellout Author, Deadbeat Dad, and Questionable Love Interest by Shang QingHua (слэш)

Shang Qinghua accidentally summons Luo Binghe from the Abyss early, throwing off the plot entirely and coming face to face with his protagonist who has not been made stronger by trauma. After saving him from touching a fuck-or-die flower at the ripe age of 17, Shang Qinghua realizes if he's going to get the plot back on track (and avoid the System killing him) he'll need to actually teach Luo Binghe about the demon realm, the messed up sex flowers, and maybe even help him get over his trauma.
He might also have to teach some demons accounting in order to make it up to Mobei-jun, and confront how treating women as trophies has messed up consequences, how trauma does not make people stronger as PIDW promised and how his own alienation from his world might actually be fucking up his life. But hey, that'll be fine! If he fails, he'll just die!
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Shang Qinghua makes a mistake and has to come face to face with the consequence of all his stupid sellout writing decisions and how they affect the real world people/characters in SVSSS