Manga The Former Top 1's Sub-Character Training Diary ~A Dedicated Player Is Currently Conquering Another World!~

The main character has obvious problems with socialization. He skipped school, both elementary and high school. He was not interested in communication with classmates, girls or any kind of sport. And, having become an adult, nothing has changed in his life. All he needs and is interested in are computer games. He decided to devote his whole life to computer games, the development of game characters here.
One morning, when he decided to play again, he found to great disappointment that his computer character had been hacked and stolen, and there was no way to save him or do anything. Emotions of disappointment overwhelmed him so much that he decided to commit suicide, since the development of this character was the main goal of his whole life, and after his loss, he did not see the point in his existence.
When he wakes up, he realizes that he is in some mysterious world, very similar to a computer game. At the same time, he is a character who looks like one of the heroes he bought and forgotten long ago. Now he will have to go through a new unique path, who knows what awaits him there?