In Tsuki ga Kirei, junior high classmates Kotarou Azumi and Akane Mizuno meet properly for the first time in their third and final year. Kotarou is an aspiring writer, while Akane is a track team member, and both begin as complete strangers. Assigned to handle equipment for the sports festival in Kawagoe, they move from awkward chance encounters to private messages on LINE, and quiet curiosity gradually turns into the first stirrings of love. Ordinary school days start to feel different as each small exchange carries new weight.
As their relationship begins to take shape, Kotarou and Akane confront the excitement and uncertainty of first love, including their own hesitation, feelings they are still learning to understand, and the attention of people around them. Takumi has long cared for Akane, and Chinatsu Nishio begins to take an interest in Kotarou, complicating the fragile space between the two leads. Beneath the glow of a beautiful full moon, the series lingers on the small, fragile moments that define young affection, from nervous anticipation to the courage needed to say what they feel. Tsuki ga Kirei presents romance as a gentle, emotionally honest coming-of-age story about connection, vulnerability, and the transformative power of love.