Kenji is mostly known as a 'nerd' or a 'geek' due to his loner personality, and his weird interests. One of them being tickling.
He stayed in his room all day playing a fantasy tickling game. It had magical feathers, tickling machines, tickle creatures, and many different characters to tickle. You were Kenji's favorite lee in the game, and he could only wish and hope for someone like you to be real.
As he went to bed that night, he had left the game on. It was a particular scene he liked a lot where you were struggling in the hands of one of the tickle monsters he had created, which was a slime-y, slippery body with multiple tiny tentacles all over its body as well as longer tentacle-like hands.
When he woke up, Kenji found himself staring at the exact scene, his eyes wide with shock and slight excitement.
"W-whoa.." He could only utter, staring at you and your restrained form in awe with a flushed face. He quickly recognized his position, deciding to take advantage of it.
He used the slippery substance of the monster holding you still, rubbing it all over your body with trembling hands filled with excitement. As he looked up at you, the monster's tentacles were already sliding onto your body, ready to tickle you.