Based on the erotic manga by Shiomaneki.

Telling 2 parts of the story.
The First Story, Asumi-chan who likes her own mama's workmate is Kuroda-kun. Asami-chan also wants to feel loved by Kuroda-kun like loving her Mama as well.
The Second Story, Amamiya an Otaku Fujoshi who aspires to become Mangaka from Ero Manga, and asks his friend for help to show the shape of the penis as a doujinshi reference.

(Source: Nekopoi, translated)