The Person I Loved Asked Me to Die in My Sister's Stead manga volume 1 features story by Mizuki Nagano and art by Maki Yamori.

Lady Wisteria's greatest wish is to be worthy of the man she loves, Lord Bright. But when Wisteria's little sister, Rosalie, is selected to enter the Predawn Realm as its guardian, never to return, Bright begs Wisteria to take Rosalie's place! After all, Wisteria is skilled with magic, and resistant to the sinister miasma that threatens the mortal world. Heartbroken, Wisteria enters the Predawn Realm, accompanied by the sacred sword, Sartis. More than twenty years later, a stranger with a familiar face appears, demanding the sword and challenging Wisteria. Who is he, and why does he resemble Lord Bright…?

The Person I Loved Asked Me to Die in My Sister's Stead manga volume 2 features story by Mizuki Nagano and art by Maki Yamori.

Twenty-three years after becoming guardian of the Predawn Realm, Wisteria is joined by none other than Lord Bright's son! Lloyd seeks the sacred blade, Sartis, and will only return home once he's defeated Wisteria and claimed the sword for himself. Wisteria has agreed to train him, but… why does he want Sartis so badly? As the pair adjust to their roles as master and disciple, Lloyd reflects on his past, and the decisions that led him to this world. If he can master the use of magic, perhaps he can take control of not only the sword, but his own destiny.

The Person I Loved Asked Me to Die in My Sister's Stead manga volume 3 features story by Mizuki Nagano and art by Maki Yamori.

As Wisteria and Lloyd venture out to face the dangers of the Predawn Realm together, Wisteria learns that Lloyd is seeking his truth: the meaning and purpose of his power. Having spent many years in search of her own, Wisteria is determined to help him find it, and protect him at all costs along the way.

Though she knows their paths must inevitably diverge, Wisteria's long-unmoving heart has begun to stir, and Lloyd's teasing certainly isn't helping! Lloyd vowed to defeat Wisteria and claim Sartis for his bride, and he swore never to break his promises… but where does that leave Wisteria?