The Blue-Eyed Material by Asaka Takishima — Cancelled

Also known as Seiten no Hekigan

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Even after one month of transferring to a new school, Natsuki keeps her distance from her classmates. Her childhood friend Haruka always tries to push her to be more sociable, but Natsuki just pushes her away. One day, while Natsuki was skipping class and eating lunch on the school balcony, a slime-like substance drops right on top of her. The slime slowly forms itself into... a human girl? An odd relationship between Natsuki and her new alien(?) sister begins.

Chapter 1: Fell Down Upon Me released Apr 7 '13
Chapter 2: Washed Away released May 12 '13
Chapter 3: I Got A Little Sister released May 15 '13
Chapter 4: I Got Used To It released May 23 '13
Chapter 4.5: 4-Koma Special released Jul 21 '13 4-koma
Chapter 5: I Got Angry released Jul 21 '13
Chapter 6: I Got Annoyed released Jul 25 '13
Chapter 7: We Held Hands released Aug 26 '13
Chapter 8: It Fell From the Sky released Aug 26 '13
Chapter 9: Our Eyes Met released Oct 31 '13
Chapter 10: What is Going On? released Oct 31 '13
Chapter 11: Thank Goodness released Jan 1 '14