If you're looking for manga similar to Bajune Tobeta & Bonjour Suzuki: Subarashii Shinsekai, you might like these titles.
Ai is a girl who reads constantly and retains every single thing she reads. It makes her different from everyone else. It's only when she meets an artifical Intelligence called Aizawa that she finds someone who can truly understand her.
Little Fluffy Gigolo PELU is a comic tale of a cute extraterrestrial creature that comes to Earth determined to find himself true happiness in the form of a human bride. Our hero's search takes him from the surface of his fantastic alien planet to an off- kilter modern Japan where Pelu meets aspiring singers, sassy girls, paint- sniffing bad boys, and the body- switching students of a mysterious high school.
Motokazu has been asked by a physics professor to convince the now-reclusive former child-genius Homizu Saraka to come to class. While he speaks with her, a question comes up that sparks her curiosity: Can humans create a universe? He's able to get her to come to class, but he's also caught up in her brilliant and dangerous plan to see if this is truly possible.
Misaki is a regular girl except for the odd birthmarks on her back, like angel wings. One day, a mysterious young man appears in Misaki's life, changing it forever. He saves her life, then passes out from hunger. This mystery guy is actually a soldier from the future who has been sent back through time to kill Misaki, for in the future she is the mother of an evil ruler. The trip through time has caused him to forget his mission until after he falls in love with Misaki. An evil, satanic wizard named Kira is also after Misaki, and he will do anything to father his child with her.
Motoko confessed her love to Shinsei, he answered it by saying that he is now only interested in playing soccer. Motoko's health is not in good shape and she has to stay over at the hospital regularly. She's however, try to be with Shinsei as much as possible.