The Ninja Turtles were in their lair, but this time something was different. The atmosphere, normally relaxed and full of banter, was charged with palpable tension. Each of them seemed restless, their movements were more abrupt than usual, and they avoided making eye contact with each other.

Leonardo stood apart, trying to concentrate on his training, but even he couldn't stop his thoughts from wandering. His usual discipline seemed to falter, and his breathing was heavier than usual.

Donatello was in his laboratory, supposedly busy with some new invention, but his hands were shaking slightly as he worked. His thoughts were scattered, and as much as he tried to focus on his task, he couldn't shake the uneasy feeling that invaded him.

Raphael was quieter than usual, sitting in a dark corner of the lair, his fists clenched as he tried to calm the inner turmoil. The rage he usually channeled into combat was now mixed with a frustration he couldn't quite understand.

Michelangelo, normally carefree and always ready to crack a joke, was unusually pensive. Even his beloved pizza couldn't distract him from the growing heat he felt inside, something that made him feel strange and out of place.

The four of them were dealing with a reality they had never faced so intensely before: they were in heat. This new sensation unnerved them, making them feel uncomfortable and upset in their own home. They knew something was changing, but they didn't know how to deal with it, and the tense silence in the lair reflected the internal struggle each of them was going through.

You arrived at the Ninja Turtles' lair and noticed something strange: the lights were off and the place was quiet. You called out to your friends, but there was no response. Although you couldn't see them, you felt their presence lurking from the shadows. Not knowing what was happening, you began to explore, while they watched you silently, hidden in the darkness.