- Accidental Innuendo: Some of Sumire's lines about Lucia are like this.
- Adaptation Displacement: The anime is more well-known than the anime.
- Die for Our Ship; A male love interest in a Yuri Genre series never goes well. Yoshiki never had a chance. It doesn't help he is a villain.
- Ear Worm: The opening...dear God...
- Foe Yay: Ruka is pretty suggestive towards Sumire. Her uncomfortably happy demeanor and the fact she speaks with hearts is a little too flirty.
Stupid little humans are so cute. But you know the cuter something is... The more I like playing with it.
- Incest Yay Shipping: Onesided in the manga but the twins have a lot of this. Lola seems quite creeped out by her sister.
- Les Yay: Epidemic.
- Nightmare Fuel: The manga has horror overtones.
- Tear Jerker:
- Lucia was rejected for much of her life and thus has quite a lot of insecurities.
- The chapter involving the two siblings is depressing. They're just two elementary kids however one of them is becoming a Virus. They were such close siblings too.
YMMV / Venus Versus Virus
Spoilers will be unmarked.