[Comprehensive] This Is a Serious Girl Manga

When I woke up, I found an extra egg in the bed. Sitting on the egg, Niwa Ikuto felt like he was hatching a chick. Literally—— An egg with dark red patterns. It cracked A small, dark little thing hatched. "Who is the little one? Remember, my name is Nakahara Chuuya. If you mention that word again, gravity will crush you!" "Are you my guardian sweetheart?" "... Huh?" The joke in this article is to protect the sweetheart setting + mouth, mouth, mouth, etc. Uh-huh (?) Involving various ancient girl comics and boy comics(?) There is more than one sweetheart to protect, after all Tom Sue has to have multiple eggs. I don't know if there is cp, but according to the author's style of painting, cp is very difficult. Concept: A story about a cute boy growing up into an upright man.