It's like the author know and feel about state of many romcoms with triangle love or "harem", so many tomboy prince-like archetype side heroine like sei lose in the race without any chance to win, it's just they exist for no reason other than heighten the drama, they tease us how they getting close only for them to become loser in the end, giving us false hope.
This is one of those rare series where they finally have chance to gain happiness, and become "main heroine" of the story.
But really ? 11 pages for a monthly manga ? 30 pages i can understand, this should've been a weekly series, 11 pages for a monthly manga it's a crime especially for this series...