Kamisama no OrgelGod's Music Box; Kami-sama no Orgel; 上帝的音乐盒; 神様のオルゴール

From ShoujoMagic: Yumi is a college sophomore. She's going out with Kouta, who's in her same circle. Just when she's been taken in by Kouta's boyish manner... she gets pregnant. What will become of Yumi and Kouta, who worry that they can't have this child...?