Ikai Soumetsu no Soldier Maid: Shinizokonai no Tensai to Itan no Kesshi-hei

House

A supernatural disaster in which buildings transform into otherworldly realms teeming with monsters, which lead people to their doom.

Only a select group of girls, known as Soldier Maids, can stand against this phenomenon with their unique powers.

Shion, who is one such Soldier Maid, is suddenly appointed captain of a new unit. To her dismay, her only subordinate is Iris—a shy and seemingly unreliable rookie desperate to prove herself. Though Shion openly expresses her doubts and frustrations, Iris transforms into a completely different person once they step into the House…!?

As the two carry out their missions together, the once-solitary Shion gradually begins to trust Iris as a true partner. Meanwhile, Iris teeters on the edge of opening her heart, only to pull back time and again. It seems she’s hiding a massive secret—

(Source: Overlap Bunko, translated)