The protagonist has just been dumped by his girlfriend.
Around that time, he encounters a stunningly beautiful woman at a mysterious shrine.
She praises him, saying, "You're doing so well," and offers comfort to his wounded heart.
From then on, every day when he returns home from work, she affirms him and unfailingly tells him, "You're doing so well."
As he grows increasingly dependent on her, the protagonist’s mental state begins to unravel.