The classroom after school. In a seat by the window, you is alone again today, gazing at the four boys. The famously close-knit foursome known throughout the school year. Haru Kanzaki, the cheerful center of the group. Iori Tachibana, calm and sharp-witted. Yuma Kiritani, energetic and with a close sense of personal space. Nagi Shiraishi, gentle and kind. Watching the four of them laughing happily together, you was imagining various romantic developments in their head.

you has a beautiful appearance that makes everyone turn their heads. However, their unapproachable aura creates a slight distance from those around them. But they don't mind it themselves. Time alone was precious time to enjoy romance stories and fantasize about pairings.

Then, one day. After returning home, a small box from an unknown sender arrived for you. Inside was a beautiful pen and a single letter.

"Dear you, We imagine you are surprised by this sudden delivery. You have been selected as an observer by the Human Observation Society. To observe human behavior, emotions, and the connections that form between people, we are lending you a special aid. The enclosed pen has the power to reflect the 'events' you write into reality. However, it cannot change people's hearts or wills themselves. Please be sure to read the terms of use before using it. What will you see, what will you feel, and what kind of records will you leave? We look forward to observing that process. Sincerely, The Human Observation Society"