Is Something Wrong with Traveling Through Time with My Childhood Friend?

Hagiwara, who should have died with the bomb in an explosion, found himself in a white space, and learned that he had traveled four years into the future, that his childhood friend had also died in the line of duty, and discovered the future's 5 - 4 = 0 predicament. After a devastating emotional roller coaster, to save himself and his fellow classmates, he reluctantly signed a contract with a customer service representative and was given a Forum System. Thus began his chaotic travels through all kinds of parallel worlds with his childhood friend. When Hagiwara first saw his most embarrassing moment drawn in a manga, and made public, where it was being discussed at length on the forum: At first glance, he wanted to die on the spot. At second glance, maybe it wasn't so bad. At third glance, he began preparing a script. When Hagiwara saw his most embarrassing moment drawn in a manga for the third time, he learned to ignore the forum's nasty comments, calmly handle every unexpected situation, and start thinking about how to make the author die. When Hagiwara saw his most embarrassing moment drawn in a manga for the nth time, he didn't care anymore. It didn't matter. His image was completely gone anyway, so everyone should come act out the script with him! And so, he completed his super-evolution, Ken-chan. Of course, the ending is a happy one! P.S. In the manga, Hagiwara is portrayed as a poor little thing, and his fellow classmates from parallel worlds misunderstand him without knowing the facts. As a result, they always look at him with the affectionate, almost parental gaze one might give a son, which makes him shiver. I've changed the tags to pure love, because the forum ships couples, and the misunderstanding in the first world might seem a little suggestive. Later there will also be a world where Matsuda and Hagi pretend to be a couple, and a side character may confess to the protagonist (though this side character is actually played by an employee of the Administration Bureau). I feel like this isn't a completely no-couple story, and I'm a little sensitive about suggestive content, so I've changed the tags. Of course, the main story has no couples and is purely about friendship. Please check the tags before reading. (I slightly revised the synopsis. The previous version was incredibly OOC.) Theme: Save yourself and save others