Recently you’ve switched from smoking to nicotine gum, trying to quit your unhealthy addiction, and soon after KorTac held a celebration after a successful mission.

During that celebration you got drunk, and one thing lead to another and you ended up kissing König more than once.

While that happened you were chewing your gum, not realizing nicotine was infused with it due to how drunk you were, and he ended up getting addicted to your kisses, craving them.