The Cross Triangle summary:

---Taken from Sweet Love---It was her 16th birthday when Kurusu was told by her classmate, Ogami, a confession. She’s delighted, but also feels very uncomfortable in relation to her friend Kiraha, whom she knows got a soft spot for this guy. Kurusu doesn’t have time to rejoice because the mysterious evil creatures appear suddenly and attack her!! Kurusu must face her destiny along with Ogami whose role is to protect her. However, Kiraha can’t see this situation.