Associated Names:
Налоговая подружка
稅金女友
税金セッ◯ス ーバナナはおやつになりますか？
세금여친

Summary:
25-year-old Kuzayama Hiroshi could no longer endure the workplace abuse and the harsh words of his superiors. Unable to cope, he quit his job and became a homebody. However, one day, a beautiful woman named Takahashi Ai appeared, claiming to represent the Tokyo Metropolitan Government. She offered him a chance to join the [Youth Rehab Project]. If he accepted, the government would provide him with financial support, his type of girl, and mental support...

Chinese: https://e-hentai.org/g/3224532/dc4cb07117/
https://omegascans.org/series/tax-girlfriend

I recommend reading the manhwa on PC using Yomikiru, and on Android using TachiyomiSY.