Kyou mo Senpai to Katakoichuu.

From Café Scans: From that day on, my world is filled with Senpai. Akari, who just entered the high school of her dreams wanted to fall in love! With that thought in mind, she was invited to a club by a flashy Minami senpai. One day, the Senpai who always seemed to hide his thoughts under the constant smile, breaks down into tears. She found out about Minami senpai's sad, hidden thoughts--??