Off-Kai Shitara Tondemonai Yatsu ga Kita Hanashi

Megumi Miki is a single woman who kept her otaku hobbies to herself!
She wanted a friend to talk to about her favorite characters... So she tried to arrange an IRL meeting with her SNS follower... only to have an intimidating yakuza man show up!
She felt like her life could be in danger, but when she talked to him, she found that he was a true hard-core otaku!
He may be a bit touchy about the proper coupling. But he's fun to be around and he's surprisingly reliable!

(Source: Kodansha, translated)