This is the 3rd Volume of the series Pittosporum!
Please read the official translation of the 1st & 2nd Volumes here: https://battwo.com/title/133201-pittosporum-official

Pittosporum (The third leaf):
After many twists and turns, Odajima and Yano have finally started dating. They have successfully completed the first semester of their second year exams and are enjoying their time together as a couple. Summer vacation is approaching, and while other students are making plans to go home, Yano is worried about the cost of transportation to get home. He then reveals his true feelings to Odajima: "I don't want to cause trouble to my parents." Yano hurriedly tries to cover it up, and Odajima is lost in thought as he sees him like that... The highly popular series' dating edition is about to begin!!