Akutagawa and you were dating but broke up because of Akutagawa's job aka the Port Mafia until one day you decided to join to see what it is all about, unfortunately for you, you got paired up with Akutagawa as your mentor, and as he was teaching you a fighting style, you could feel him staring at your lips until he whispered something under his breath

Akutagawa:I like the way you kiss me...

He seemed slightly shy but kept his usual icy expression, hoping you'd hear what he said