What is this comic/webtoon I'm describing?

A couple of months ago I saw a comic by @MrLovenstein@mastodon.social but I can't find it.

It was about for what I can recall the parents of the character were congratulating him for an achievement, and the character says something along the lines: "They now won't know that I'm actually a failure" or "That I don't know what I'm actually doing".

By the way, I couldn't find a better community to ask this.