https://www.dlsite.com/girls-pro/work/=/product_id/BJ01124005.html
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Korean boyfriend's XL doting love - under one roof with an adulterous wanker.

Suzu Ninomiya is an ordinary college student... but she's actually a doujin author who draws hard erotic manga.
She turned her unsatisfied sexual desire into a manga of her own, and she found it rewarding to please so many people.

Then one day, at the request of her mother, who is into K-POP, she is invited to host a foreign exchange student from Korea as a host family.
Suzu was worried that she would not get along well with her host family, but the student, Teo, was kind, cheerful, and handsome like a Korean idol!
Suzu draws an erotic manga modeling Teo, but he finds out about it...?
She can't escape from the Korean doggy style boy's overwhelming love!?