Insomniacs After School is a heartwarming slice-of-life romance manga about two sleepless teenagers, Ganta and Isaki, who secretly use their school's abandoned observatory to escape insomnia, loneliness and the pressure of daily life. Under the star-filled sky, they bond over late-night talks, photography, youth struggles and unspoken feelings, slowly healing each other through shared vulnerability. Soft, atmospheric and emotional, this series is perfect for readers looking for calming romance manga, youth coming-of-age stories, mental health themes, school life drama, slow-burn love, astronomy aesthetics and cozy night-time vibes. Fans of A Sign of Affection, Whisper Me a Love Song, Your Lie in April and Blue Period will adore its tender storytelling, intimate character moments and beautiful art. 🔎 Keywords: Insomniacs After School manga, slice of life romance, school insomnia story, healing slow romance manga, youth coming-of-age, astronomy observatory manga, cozy emotional manga, teen mental health love story. Meta Description: Insomniacs After School is a soft slice-of-life romance manga about two teens who can't sleep, finding comfort, love and healing in a secret observatory under the stars. Alternate Titles: Insomniacs After School Manga / Kimi wa Houkago Insomnia / 君は放課後インソムニア / After-School Insomniacs / Insomniacs manga english