So, binding girls is how you level up?

This is an alternate world almost identical to Earth, with the only difference being the existence of extraordinary abilities possessed by a select few... Through a twist of fate, our protagonist, Xiao Xuan, joins a mysterious organization, truly realizing the dream of this girl obsessed with bondage – by binding fragrant, soft girls, she can grow stronger... A charming girl next door, a seductive older sister... one by one, girls become experience points for Xiao Xuan's advancement. This truly is a wonderful world (edog).