@Darklight99 Even if he hasn't written anything substantial, he still writes novels, or at least tries to. That's why he tries to find an inspiration somewhere. He even said "I don't want anybody to know that I haven't taken the first step" or something along those lines, which strongly suggests that he simply didn't want to be looked down by people who he was looking down on moments ago, and that's why he lied.
And if you lie, you better be prepared to get exposed, no matter how small the lie is. And it's not like his secret is a very confidential information. He could have just admitted it the first time around but no, he had to dig deeper and that's what got him into a mess. He's an adult already, and must be responsible for his own actions and not blame it on someone. Like, if I was cheating on my partner and some unknown guy snitches on me, can I really blame the snitch and tell him "it's none of your business"? Of course not, I could only blame myself for not being faithful. Same with Enami, he has himself to blame for lying.