Watashi no Koi no Hajimekata
わたしの恋のはじめかた · わたし の こい の はじめかた
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
"I'd love to see the look on senpai's face when she falls in love.” Chisaki, a dating show enthusiast, has helped numerous couples come together, earning her the nickname "Matchup Senpai." She has plenty of knowledge, but she doesn't actually have any personal experience with romance, and she's given up on her own love life. Until she falls in love with a junior boy, Leo! While still supporting her friends, she finally decides to write her own love story with Leo-kun! (Source: Kodansha, translated) Note: Includes three extra chapters.
Source: AniList
External databases: AniList
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