Chores Unending is the first stage in Another New Year.
The battle starts with one Hippoe. After around 10 seconds, a Lione Hippoe will spawn. The Lione Hippoes will spawn during the entire battle as peons alongside normal Hippoes. The delay between Lione Hippoes is 20~26.7 seconds, not including some extra ones that spawn at 23.3 and 80 seconds. After around 20 seconds, Sister Lione will spawn with a few peons.
If you want to beat this level you will need 3-4 meatshields. Cats that can freeze Sister Lione are also highly recommend. If you have cats that outrange Sister Lione, bring them. Do not bring Uber Rares who can easily get hit by her as they can die easily.
Strategy 1 (not tested)
Row 2: Sexy Legs Cat, rest is yours to fill
Kill the Hippoe and Lione Hippoe for a cash boost, Sexy Legs and Dragon should do the trick. Once Sister Lione comes out, start using Kotatsu (the higher its level, the better), and be sure to spam Dragon Cats. Send when you can and you should be able to ace it.