They really went and said it a lot earlier than the LN did (about Yuki), wow, I thought they were gonna hide his face or something but guess not
@Emachookie @Mahika I heavily recommend reading the LN from the very beginning, while the manga
does follow the LN, there are many things that aren't included (or modified), even though they can be pretty small things (I believe most LN readers can agree with me that some of the most hilarious stuff wasn't adapted), if I recall correctly, some bigger things didn't make it in the manga (can't tell you what exactly but I'm pretty sure I thought the manga missed some things while reading it), so it's very very worth it imo
If I were to tell you around when this is though, then it'd be the start of vol 6 (oh and Yuki being the mastermind isn't revealed until much much later so when they're talking about him they often use "Boss", "Young man" (official translation) or "Boy" (fan translation), in case you do start there, so you're not too confused)
You can find the first 10 volumes on Just Light Novels, currently it has the official translation up to vol 8, and vol 9 & 10 are fan translated and it keeps updating with time
And if you want to buy the LN, you can find the first 8 volumes on yen press for around 14~15$ each