Moyuru Haru ni Deau Bokura

Takanashi Haru, a plain and unassuming boy with black hair and glasses, secretly has a crush on the popular teacher Nanjou. His crush is accidentally discovered by his classmate, Sanada Kazuki, a flashy and popular guy who is the complete opposite of Takanashi. Sanada takes an interest in Takanashi's unrequited love for Nanjou and tries to help Takanashi attract the teacher's attention. But as Takanashi starts spending more time with Sanada, he begins to experience Sanada's kindness... Maybe Sanada isn't just the flashy guy he appears to be...? What will become of this usual pairing...!?

(Source: AlphaPolis, translated)

Notes:
- Chapters 5 and 7 were split into two parts in the original serialization and later combined in the volume release.
- Includes one extra chapter.