Oshinobi Dousei

お忍び同棲

by Pon to Gotanda

Tae, a beautiful 17-year-old high school girl, and Kotarou, a no-nonsense office worker, are living together. This seemingly happy couple share a secret they can't reveal to anyone - they are ninjas from the rival Iga and Kouga clans! A laid-back ninja cohabitation romantic comedy! (Source: Comic Action, translated)