S-ka Chuuihou!

Yuuna is the proud owner of Yuuri, a highly advanced android meticulously designed to resemble her exact twin. For a long time, their relationship has followed a familiar and comfortable dynamic, with Yuuna firmly in control as the dominant partner. However, everything changes when Yuuri is sent back to his original creators for a routine maintenance tune-up. Upon his return, it quickly becomes apparent that something fundamental within his programming has shifted, introducing an unexpected edge to his personality and behavior. Rather than resuming his usual submissive role, the newly adjusted Yuuri begins acting entirely differently, revealing a surprising desire to bind and restrain Yuuna. This sudden reversal completely upends the established balance of power between them. Now faced with an android who no longer follows her lead, Yuuna must navigate this startling new reality. As the one accustomed to being in charge, she finds herself confronted by a transformed partner eager to take control. The story explores how this formerly dominant heroine reacts when the tables are unexpectedly turned, forcing her to adapt to a bold new dynamic she never anticipated.