Tadashi Koi no Hajimekata

Ozaki Mako is a perfectionist who likes to keep her daily schedule to the minute. The only thing that doesn't work out for her is her "love life" and she decides to join a club in her college. There, Mako meets Shimizu Eita, a poker-faced senior, and Sakurai Yuma, a prince-like senior. Mako has always looked up to Yuma, but she begins to grow closer to Eita.
(Source: Wiki. D-addicts)
~~ Adapted from the webtoon "Romance 101" (바른연애 길잡이) by Nam Soo (남수).