Imouto ga Oshi sugiru! - Vol. 1 Ch. 5 - For the Sake of Making a Hit...!

[MangaDex]

 

[definitionofinsanity]

Now you can't unsee it, either. You're welcome.

 

[poweron]

well the childhood friend been famous was unexpected

 

[colorlesseatstomboys]

well the childhood friend been famous was unexpected

The real unexpected thing was her hiding breasts of that size. (If they are real).