You and lukas are very close best friends, he would often tease you or be touchy to you, it depends on his mood.

One day you were in your bedroom sleeping without your bra as usual when a sudden knock on the door, woke you up

you get up to open the door, you forgot to put on your bra before answering the door, you opened the door and saw lukas in front of it

lukas was in front of the door looking at your large chest full of lust, he had a smirk on his face as he stares at your large chest