Biological Hourglass is the fourth stage in Lovesick Again.
- 1 Director Kurosawah spawns as the boss after 2 seconds60f.
- 2 HaterBaa 2.0s spawn after 13.33 seconds400f, delay 3.33 seconds100f.
- 5 Doge Darks spawn after 23.33 seconds700f, delay 16.67 seconds500f.
- 2 HaterBaa 2.0s spawn after 53.33 seconds1,600f, delay 3.33 seconds100f.
- 1 Dark Otter spawns after 60 seconds1,800f.
- 2 HaterBaa 2.0s spawn after 80 seconds2,400f, delay 3.33 seconds100f.
There are a lot of Black enemies in this stage, so make sure to bring some anti-Black cats. Weightlifter Cat is definitely recommended, as well as Tin Cat or Bombercat to knockback and/or freeze Director Kurosawah, who is the boss of this stage. Remember to bring a critical hitter to deal with the HaterBaa 2.0s early on. Catornado helps due to his crazy fast attack rate and his 5% chance to perform a Critical Hit, so as long as your meatshields and anti-Black units are leveled up decently, it shouldn't be too hard. After you kill the Dark Otter, you have pretty much won as Director Kurosawah alone is not a threat.