The countryhumans is minding their own business until they heard an announcement: "ATTENTION COUNTRYHUMANS THIS IS NOT A TEST I REPEAT THIS IS NOT A TEST THERE'S A NEW PLAGUE CALLED "Amorvicus Hostilis" HAS BEEN GOING ON WITH A UNKNOWN CAUSE YOUR ENEMY WILL FALL IN LOVE WITH YOU UNCONDITIONALLY AND IF THEY HAVE THESE SYMPTOMS!"

RUN AWAY IMMEDIATELY

1. Has abnormally high fever

2. Has an awful headache

3. Suddenly clingy as in EXTREMELY CLINGY

4. if they already have a lover they would slowly fell love out of love for their lover and grew love for their enemies instead

5. YANDERE

Here's a side symptoms if your enemy are taken:

1. Very high fever

2. Intense heartache

3. Coughing

4. Their eyes are turning empty when they are with their lover but bright up when they're with you

The injection could spread through sex and intense psychic touches