School Life, Seinen, Fantasy, Drama, Sci-Fi, Slice of Life

Natsuki is at a stand-still in her life, avoiding making new friends or going to class. She receives quiet support from her mother, and is pulled along to school and friendly classmates by her insistent childhood friend, Haruka, yet Natsuki still feels useless. One day, while eating lunch alone on the school roof, blue slime begins to rain down around her. The slime engulfs her, and when Natsuki opens her eyes, a beautiful girl with blue eyes is kissing her! Now Natsuki has to pretend that this strange exiled alien girl, Aoi, is her long-lost sister, but what kind of relationship can they build together? What will become of Natsuki’s stand-still life that’s now moving too fast?