From Manga Art:
Story about the love between a mermaid named Myuu and a demon named Jirou. This book has various oneshots about the two characters.

Hikari is a new shinigami (god of death) at Yomi Castle and is doing her best every day to get used to her onerous duties. Her duties are to manage and fulfill the destinies of humans. The only thing that keeps her going is the kindness of her superior, Commander Ryouma. The akashic records that list human destinies are stored under tight security in the castle. But, when a disastrous event happens among the shinigami, everything changes...

By a shiny day, the older brother of Shunta, a potter, made a beautiful clay doll looking like a girl and called Nene.
She was so cute that Shunta couldn't help wishing that she was a real girl... and then a miracle happened, the next day, Nene was alive, moving and creating living dolls by kissing clay dolls.
So begins the life of Nene the doll, a shiny life soon disturbed by a strange inventor, creator of a male android.

* Contains a oneshot called Mirai ni Kiss - Meiko, a 14 year old Robotics genius, travels a hundred years forward in time. However, the future is completely different from her sweet daydreams.

This is a story by the author of Kero Kero Chime, and you can tell. The characters look similar, though the plot seems different.

Rupika lives on a far off planet called Rakariina and has a growth on her head that looks like a tiara (called the Twinkle Tiara). Her grandfather tells her that her destiny begins when she meets a man with the Twinkle Crown. Every so often on this planet, a lot of meteors fall and a lot of new aliens land on the planet. Rupika goes out to see this and maybe find 'her prince' (the Twinkle Crown) and is captured by a boy named Alpha, who then mentions something about someone named Rozeus. Rupika wants to see Rozeus and leaves Alpha's spaceship, which is actually a big turtle. The new aliens seem to know something about her tiara and start harassing her, and though Alpha tries to control them he gets knocked out. Rupika's situation turns desperate but suddenly a man with the Twinkle Crown appears.

Contains an unrelated side story called Taiyou ga Ippai! (A Drink of Sunlight) in vol.1.

From Antisense Scanslations:

Mimori is the princess of the frog kingdom, a fantastical place populated by the human frog tribe and, well... frogs. One day a young boy named Aoi shows up on the borders of the kingdom, claiming that Mimori's elder brother Makaeru cast a spell on him that causes him to transform into a frog when splashed with water. Together, Mimori and Aoi set out on a journey to find a spell to cure him. (And things only get weirder from here on out.)

From Antisense Scanslations:
New shinigami Hikari is doing her best every day to get used to her onerous duties. The only thing that keeps her going is the kindness of her superior, Commander Ryouma. But, when a disastrous event happens among the shinigami, everything changes... This slightly steamy manga is Fujita Maguro's latest work.