Christmas is the most romantic time for Mikan and Natsume
- Mikan tooth-kissed Natsume at the Christmas ball.
- Natsume kissed Mikan while they're sitting at a tree branch.
- The next christmas, they reunited for a while at the balcony and kissed for three times.
Source: natsumeislove
Mikan is Natsume's first love
Natsume has never been in-love until he met Mikan. Simply because when Narumi uses his alice on a kid who hasn't experienced love yet, they faint. And that is what exactly happened to Natsume in the first chapter.
Source: natsumeislove
Source: natsumeislove
Narumi has a limitless alice shape
It means Narumi's alice, which is the Human Pheromone, is very powerful and can be used as often and as much as desired, but impacts the user's life with each use and can even kill him if overused. It doesn't mean it shortens his life span, rather it causes big impact on him whenever he overuse his alice. Like when he used his alice on Yuka to force her not to leave the academy in the past, he overused it which cause him to faint. His alice can't be stolen completely, since it's limitless. When Yuka tries it, the result was only endless alice stone from Narumi. His alice is also powerful to the extent that he has alice-restricting devices such as ring and earring.
Izumi is older than Yuka by 12 years
It was stated that Izumi was a teacher when Yuka entered the academy as a student therefore he was older.
Jin-jin's frog always punctuates him
Jinno-sensei's frog, which is on his shoulder, actually punctuates every statement he makes with a croak.