Learned to Love is the last stage of Weak & Midly Acidic. When clearing the stage, you have a small chance to unlock Red Riding Mina.
This is the only stage where Codename: Red Riding appears as a boss. She can snipe the Cat Base from miles away, so be on your guard at all times. Note that, although she attacks from a range of 1500, her attack hits from ranges 2800 - 3700, so stalling is ineffective, and your back line will never know peace. The variety of powerful enemies as support does not help. Starting from 2:15, Brollows come out in packs roughly every 80s, so watch your back.
Lineup: Awakened Bahamut Cat, Crazed Macho Cat, Eraser Cat, Crazed Giraffe Cat, Crazed Wall Cat, Macho Leg Cat, King Dragon Cat, Jamiera Cat, Crazed Sexy Legs Cat, and Ururun Cat.
You need to start off with an immediate Crazed Giraffe Cat to kill the peons and hurt the boss. During this time, upgrade your efficiency to level 4. When two H. Nahs spawn, let them get close to your base, in a position where they are about to attack it. Then, fire the cat cannon, and buy Awakened Bahamut. Make sure to protect Bahamut with meatshields. When the H.nahs die, the sunfish will have spawned, but don't worry about him. The boss has extremely long range and can attack your base almost as soon as it comes out. When the H. Nahs die, buy your entire army (except Ururun), to kill the boss. Expect the boss to bring your base to critically low health when you kill it, that is normal. After you kill the boss, you will deal with the sunfish, Brollows, and three Le'noirs. Buy your ranged attackers and Jamiera to slowly kill the Le'noirs. then buy everything to take out the sunfish. Watch out for the Brollows after you kill the boss. Anyways, kill the sunfish, and hope you unlock the new cat when you win.