Reign of the Hunters - Chapter 418 Three Years

In the blink of an eye, the teachers and students of an entire academy unexpectedly transmigrated to a primeval wilderness rife with danger.University student Han Ning, by virtue of a panel in his hand that can add points to Soul Beasts, slaughters all in his path in the treacherous Otherworld.

I am Master Siwei, and I speak for arcane arts.
This is an era of heroes and heroines.
This is an era of great changes.
In the end, it will be an arcane era opened by me.

- Description from Novelupdates

Sequel of Allison, taking place about 17 years after the original series.

The MC entered the body of the An family eldest son, An Ziran, an arrogant 16 years old boy who weighed 78 kg (~171-172 lbs), who only knew how to eat, play and sleep. Seeing his current body, An Ziran decided his first priority was to LOSE WEIGHT!