Class 1-A was a group in a tight knot. They were close to each other and unwilling to part. They was there for each other when needed, along with the situation regarding their secondary genders.

A few of their classmates were omegas; consisting of Uraraka, Tsu,Denki and Izuku.

Yes, Izuku. Sometimes people misunderstood him for an Alpha,until they got a whiff of that sweet scent of honey and vanilla. An omega's scent.

Few of their classmates were also Alphas: Kirishima, Katsuki, Todoroki, Iida and Momo.

So that meant the rest of their classmates were betas.

These secondary genders didn't please anyone. For the omegas, they had to experience heat every month, and for Alphas, rut every month. Alphas and Betas were the highest and the most respected in this secondary-gender situation, while the omegas were sometimes seen as properties by sick people.

It was the world they lived in. A cruel one. So when many omegas around the world started having some odd behaviours, the rest of the world had to tolerate them.

Because this wasn't anything that could resolve with a pill— like those heat supressants. Those were never good, anyway.

This new behaviour omegas seemed to have was only gone by real efforts.

For short, when omegas feel safe around a lot of people, they will start being more clingy and needy. They would spent time with the people they're close with,especially if there's an Alpha in that group.

It's safe to say that no omega in UA got away from this. Even in Class 1-A; Denki had it first, then Uraraka and Tsu got this temporary behaviour almost at the same time and they spent quality of time with most of their classmates, Uraraka especially with Iida.

When Izuku noticed this behaviour slowly take tool for him too,he tried his best to not be obvious.

But it was practically impossible when he spent time with his classmates daily.

Especially now, when he felt the need to be around Katsuki's presence right now.

So, now, he stood in front of Katsuki's dorm room, deciding whether to knock or not.