I Can't Wait Anymore -The Guard Dog in Room 405-

Skipping straight to the proposal!? Momoko's coworker Itsuki is unsociable and unreadable, but for some reason, he's overly protective of her, earning him the nickname "Guard Dog." Momoko has a secret crush on him so she enjoys the attention, but she worries because she doesn't know what he's thinking. One day, Itsuki saves her from her clingy ex by saying, "Momoko and I are going out. Leave my woman alone from now on." Even though it's a lie, it still makes her happy... when suddenly, he gently pushes her down, saying, "That was half a lie and half what I wanted"...? It's her first time being caressed so lovingly, and it feels so, so good, but... (Source: Renta!) Note: Includes one extra chapter.