I only got to read a chapter that was releasd and am looking for it again about a guy that goes to a school that is now coed but used to be an all girls school well to miss his initiation process he hooks up with a girl that was totaly not interested in the kinda thing the other girls were doing. the end of the chapter shows them coming out of a room together and him saying she claimed him and another guy giving him her school uniform tie so everyone would know he was off limits. what is the name of this manga??

sounds like Gakuen Ouji