Attack on Titan: Core

This is the story of a man who has knowledge about his Gundam. A player of GBN, until when he was about to enter another server, he enters to a world full of Giant humanoid known as Titans eating humanity.

What will be his purpose when his Gundam has shown to the corrupt world of Eldia and Marley?

( I don't own anything here. The Gundam series belongs to Sunrise. Attack on titan belongs to the owners. The custom builds belongs to the builders. This'll follow the Attack on Titan storyline with a mix element of AOT 2. Inspired from IBO and AOT fanfic also, credits to the author.)