Hiyoko to Yoru to Yuuenchi

Kiyoshi, who's working in a foreign currency financing company, is a popular super darling who can do anything. Touya, the investigator of a detective agency, is a tender-hearted man with common sense. Kiyoshi, with an unprecedented amount of self-confidence, keeps on spinning Touya around and giving him lectures. Kiyoshi, who can be easily frightened by love only, keeps on showing Touya his world-class coolness and love. There are times they became insecure, but this is a very happy love life. (Source: Kodansha, translated) Note: Includes two extra chapters.