Yui Fukuo

When 39-year-old Takebayashi Ryoma dies from blood loss (after sneezing and hitting his head on the ground), he is reincarnated as an 8-year-old boy in a fantasy world. Not the greatest way to bite the dust, but at least he reincarnates! Set on this path by three major gods, Ryoma begins to live a life of solitude in the forest, studying slimes. But if you're a fan of isekai...you know life for him won't be that simple.

Touya Mochizuki was accidentally killed, and as an apology, God allows him to be reborn in a fantasy world and will grant him any one wish he desires. And so, Touya chooses to keep his smartphone in the next world. In his second chance at life, he befriends many important figures and comes across the world's secret. He inherits the legacy of an ancient civilization and travels around nonchalantly while possessing powers that rival this world's kings.

Maiharu Hiromi has moved to Kamakura Nagasaki, and rides a bicycle to school everyday. Then she meets Akizuki Tomoe, the leader of the girls cycling club. She therefore joins the club and her life gradually begins to change.

Time Travel Shoujo is based on a 1983 book titled Jishaku to Denki no Hatsumei Hakken Monogatari by Japanese educator Kiyonobu Itakura. It is part of the Hatsumei Hakken Monogatari Zenshuu series which describes the story of various scientific discoveries and inventions throughout history. The 1983 book focuses on discoveries related to magnetism and electricity.