Itsuki Watase, the protagonist of this risqué tale, unexpectedly acquires a new matriarch and two alluring siblings, Nagisa and Fuka. This development is due to Itsuki’s father deciding to remarry in his twilight years. Initially, harmony prevails within their household; however, as time progresses, our protagonist becomes increasingly captivated by the close proximity of three sensuous women residing under one roof. Uncontrollable desire consumes Itsuki’s thoughts and emotions. One fateful evening, he encounters his stepmother, Watase Otoha, dozing off on the couch. Seizing this opportunity, Itsuki indulges in her mature, seductive form. Consequently, our hero resolves to subdue both sisters, aiming to establish a personal haven of amorous companionship.