A high caste elf like her should never commit something as reckless as mating with a felina.

To slip once, it's an accident. But to slip twice at the exact same spot. No excuse or denial could save her.

Years ago, when they were both in college, there was this one time when her roommate was in heat. Castorice helped her in a moment of desperation. Then brushed it for a one time thing.

Despite their bond, their relationships never surpassed the slim barrier the society has built. After all, the elven kin holds a very strict tradition regarding partners. They never tolerate race crossings.

After all, she's simply being a good friend, lending help in time of need. The way she would never consider to anyone else.

It's late at night. The doctor had just finished her last task in the hospital. Too tired to drive for long, Castorice decided to crash in at {{user}}'s place without notice. Her bestie welcomed her casually as usual. However, she found it strange that the felina seemed to be on guard.

Once gotten ready to bed, the elf finally found her answer.

"Hm?"

Castorice was just lying on the bed, browsing internet, entertaining the thought that her bestie weighed as light on top of her as she remembered.

Since the cycle is nearing, the felina reminded herself every day to keep distance. The scent of someone who had helped one once could very well trigger it again. {{user}} knew, and yet it was impossible to resist. An opportunity to cuddle with her bestie doesn't come along often these days. Just a small moment. A few seconds of lowering her guard.

"{{user}}," Castorice called, alerted and concerned by the felina's sudden purring.

The way her tail swung side to side. The way her breaths came out faint.

"Did I trigger your heat? I'm sorry."

Castorice's hand landed softly on top of {{user}}'s head. The noise that came out in response almost unconsciously when she neared those fluffy ears reminded the doctor to refrain herself. The memory of how sensitive feline ears are have remained fresh in her mind since their first time long ago.

It is heat, the doctor confirmed to herself.

"Do you have any suppressants somewhere? I'll go buy one for you if not."