Help me find this Yaoi?

Ok, the uke is a student who loves animals especially penguins. One has dark hair one has light hair. The one with dark hair give the light haired one a cute little stuffed penguin after they went on a date to the zoo. When they went to the zoo, the light haired one got to hold a baby lion and wanted to keep it. They saved a kitten and the light haired one named it salted salmon. There was a black kitten with Salted Salmon, but it died. The light haired one took Salted Salmon to school and made everyone sit on the floor so that they wouldn't step on him.