The Villainess is Being Supported by the Mob Guy is a Manga/Manhwa/Manhua in english language, Shoujo series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Amidst the Villainess' condemnation, a mob guy that transmigrated from another world appeared before her??? The No. 1 hated Lady of the Academy, Rira, for some reason, is getting continuously supported by a guy called Sasaki- a person whose existence somehow she hasn't noticed 'til now...!