Hajimete desu wa~! Okumi Ojousama wa Hinako-chan o beta homeru.

Your lunch, Shimoya-san? Pathetic~! Poor high school girl Hinako Shimoya lives in poverty and is left all alone in class because of it. But when the ultra-rich heiress Okumi Kanamori takes a bite of Hinakos homemade lunch, her delighted cry of This is my first time~! echoes through the room. A clash of poverty and privilege as the two girls share more and more first times together, a friendship that money cant buy begins to blossom in this offbeat school comedy. Source: Comipo (Translated)