Shitsurenshita node Vtuber Hajimetara Toshiue no Onee-san ni Motemashita

Shocked after Yuki Himemura found out that the club senpai he was crushing on got a boyfriend, he decided to become a VTuber—something both he and his senpai have always liked—and used his savings to assemble his equipment. He gets his virtual character designed only to discover that it's a 3D model of a cute girl and, in the process, unintentionally ends up portraying one! Not only that but the person who designed and rigged his model and his favorite VTubers are starting to take a liking to him...? (Synopsis via Novel Updates)