Lyric

People grow up and become adults while nurturing a variety of complex emotions - such as longing, jealousy, and love.
Yet everyone has that innocent moment when they first encounter these emotions; in those moments, children fear and agonize over the stirrings of their hearts - stirrings they cannot even name - and simply struggle desperately to cope.

This is a story set after school at a certain school.
The girl who appears in a deserted classroom bathed in the setting sun possesses values more mature than her years, a bird's-eye view of the world, and a high degree of empathy. Once someone visits her, she effortlessly uncovers the true nature of the unknown emotions dwelling within their heart.
In this way, she guides those who are lost, sometimes charting a path for them, and other times gently stroking their back.

People called her the "Psychological Detective" for her ability to unravel the mysteries of young hearts.