Koi no Mimi Yori Chuuihou

Hajime can't wait to make the scene at his high school...but his dreams of coolness are soon dashed by the appearance of the weird and wily Nagura! A third-year elite student with a serious thing for perfect ears, Nagura will stop at nothing 'til he's swabbed Hajime to his heart's content! How long can this pair of almost friends keep their cat-and-mouse game going? (Source: Juné Manga)
Ashita Hare Nochi Inu Youbi
Yochi seems to give all his attention to his willful and high-spirited new pet. But his boyfriend Tsujimura isn’t worried. Who ever heard of a dog as a love rival? (Source: TerribleTrio)