Chapter 4.1
Momose is a Math genius! He thinks all things can be calculated... That was until he met Maruko Ai, a chaotic girl who believes in 'love angels' and other such things. Maruko has a one-sided love for Momose's childhood friend, and now Momose is surrounded by many problems he can't calculate. And his biggest problem of all... Is it love?!
Chapter 5.5
Tomonaga Kairi is the top student in his year and and a skeptic when it comes to the universe. But one day, he accidentally gets involved with the eccentric Nanbu-senpai, president and the only member of the Space Research Club. What will happen to Tomonaga when she tries to get him to join her club before it gets abolished...!?