Hana To Kurumi To Amai Seikatsu summary:

From Hoshikuzuu Scans: While studying horticulture in England, Minoru lands an internship as the assistant to Sakura Yuji, the brother of his favorite lecturer, Mika. However, despite Makoto’s stellar grades in school, Sakura has only been using him for common chores and cleaning up his personal belongings. He’s got a bad attitude and lives a messy life. But in terms of work, he is perfect. Will Makoto be swept up in this Sakura…?