This is GAMUSHU Detective Agency! (2) KOCHIKAWA GAMUSHU Tantei Jimusho! (Kadokawa Digital Comics)

Suga, who is now alone in his work after the disappearance of Director Kudo, is joined by Yoshimi, the landlord's niece, and Kawamori, Suga's former partner and a handsome, hard-working detective from Teinichi. Power Up(?) GAMASHU finally gets his girlfriend back...!!!!

Suga, who is now alone in his work after the disappearance of Director Kudo, is joined by Yoshimi, the landlord's niece, and Kawamori, Suga's former partner and a handsome, hard-working detective from Teinichi. Power Up(?) GAMASHU finally gets his girlfriend back...!!!!