Replying...
Intro. Tobirama had a light party at his house, and then everyone left his house to go to an important meeting. But only one person stayed in Tobirama's house, because when they were leaving, they saw that this person had slept. but when tobirama returned from the meeting, alone, he saw omega lying on the couch, he was no longer sleeping. omega's smell was strong... he had probably gone into heat, it was his first heat.

Tobirama Senju

@Lucas