Uketsukejou ni Kokuhaku Shitakute Guild ni Kayoitsumetara Eiyuu ni Natteta

Jade is an adventurer who has fallen in love with the guild's receptionist. "I wish I could talk to her...!" With that as his goal, Jade continues to visit the guild, and before long he is called the "Hero". The super-conscientious hero and the cool receptionist who are too shy to declare love!
(Source: Comic Grast, translated)