Love Mari

Kotomiya Fuuko is a plain office lady in her 30s who lives for her work. Following the will of her mother, who was her only family, she ends up marrying her childhood friend, popular actor Niinami Rin! Of course, this is a secret from everyone. Then, Kaihoku Mikuru, an actress who is a co-star killer, suddenly becomes close to Rin!!! (Source: Shogakukan, translated)