The supporting character's harem is very normal - Chapter 214 Rules in the Novel

What would you do if you were transported to an academy where becoming immortal was possible? Where magic spells and swordsmanship were your courses and fighting zombies and wars were your exams? Dawn Academy was no ordinary learning institution and Xiao Lin was about to find out how mysterious and exciting this magical academy really was.

Waking up in the middle of that, she nearly screamed—until she saw him.Her cold, obsessive husband. The man she had spent an entire lifetime running from.In her past life, she trusted the wrong people. She abandoned the man who truly loved her and ended up betrayed, ruined, and dead.This time? Ha! Divorce? Dream on.Since fate gave her another chance, she’d play the game her way. Stay mysterious, act sweet, and turn every schemer against each other.And as for the dangerously obsessed husband?Let’s see who traps who first!

The apocalypse has not yet begun, but the system has arrived early.

Then Chen Mo’s style of daily life suddenly changed.

You can get rewards for eating and petting the dog, and communicating harmoniously with beautiful women is regarded as a battle with the ninth-level corpse king!

[It was detected that the host was so brave that he fought the ninth-level zombie king until he lost all strength. Since the target level was too high, the host could still get points as a reward even though he had not completed the kill by overstepping the level of the enemy. The host is hereby rewarded with 5,000 survival points and an A-level gift pack. 】

Chen Mo, who had just finished the battle with his schoolmate, couldn’t help but have a strange look on his face when he looked at the translucent floating window in front of him and the harmless schoolgirl beside him.

[It was detected that the host had tamed a fifth-level mutated corpse dog. Because the target level was too high, the host jumped over the level to tame the alien beast, which is unparalleled in charm. We hereby reward the host with 2,000 survival points, a B-level gift pack, and +50 charm! 】

Chen Mo, who had subdued a wolf dog with snacks, listened to the prompts in his ears and felt quite fucked.

Chen Mo lives a normal life, but in the eyes of the system, his life is full of monsters and ghosts.

This resulted in Chen Mo being able to trigger various rewards with every move he made. When the end of the world came, Chen Mo’s rewards would be maxed out, and his combat power was incredible!

- Description from novelbuddy

Sometimes dying isn’t even the worst part of your dayMark has been reincarnated into a dead town in a bog, one that has been recently destroyed and occupied by ravenous undead. They disappear every day and return again at night, mindless and hungry, hunting for any survivors. He’ll need to use cunning and subterfuge to avoid them, because since he was transported into the body of a child, he can’t level up. At least not yet.Bog Standard. It means “totally normal”, right? But for the small towns found in these bogs, there's no quick rescue and not much trade. Everything has to be made to last. To them, it means “excellent quality”. Mark will have to prove he's Bog Standard if he hopes to survive.This is an Isekai of excellent quality. It’s a progression fantasy set in a LitRPG world, rags to riches with an eventual OP main character. The pacing is slow-burn, incremental progression, sometimes slice-of-life, punctuated by moments of intense violence and possibly traumatic content.