Manners of Love in Company

From Attractive Fascinante:

1-3) Tokunaga Atsuya fell in love with his new superior, Kawai Hitoshi. Kawai gave people a feeling that he’s always horny to hide his unrequited love for their colleague and dorm manager, Yuki. Tokunaga didn’t want to be a replacement and tries his best to win over Kawai. Kawai wants him to decide to be a stress-relieved partner or to be capable team player. Can Tokunaga excel in both roles? Includes Yuki’s love story with his own superior, Hoshina.

4. Beard and Adolescence
   High schooler Yamazaki's goal is stern teacher Takashina. Yamazaki's even grown a beard to look more manly, and because sensei will find him and scold him every day for it. With an adult appearance and childish nature, will Yamazaki confuse even the confident Takashina?

5. Everything's Fine as Long as There is Love
   Yuusuke is madly in love with his tutor, college student Nari Ogihara. One day when he accidentally confesses his love, he's shocked when Nari accepts his confession! But Nari has scars from the past that make a relationship difficult, if not impossible…