Not the actual love at the first sight...
After lakritsi got beaten up by Suklaa, Leader of Yakuza gang Kawaii Death, Vaahtokarkki found him lying down on the alley and took him home, covered him with empty pizzaboxes and took care of his wounds. Vaahtokarkki found him very cute and adorable and had decided he will be her boyfriend, and Lakritsi did just think that she is crazy as fuck.
Before he even left the house, he awkwardly noticed that Vaahtokarkki was actually Suklaa's sister. He soon came out with the plan: If he became close to Vaahtokarkki, he could use her as a shield and take his revenge to Suklaa. So Lakritsi pretented to fall in love with Vaahtokarkki and made Suklaa to took him in her gang (because no one says "no" to Vaahtokarkki). He doesn't care a single bit about Vaahtokarkki or her feelings, but because he is now her boyfriend, Suklaa can't make him leave, and she has to stand him. Lakritsi decided that he would still become one of the four big Yakuza leaders, he just needs to manipulate Vaahtokarkki on his side on everything and sweep Suklaa out of his way and take Kawaii Death under his leade.
unfortunately for him, he has to go with Vaahtokarkki's ridiculous cutie-wutie-wheee-things before his up-coming rising from the ashes.