I'm looking for a manga about a lady dating her boss or coworker. Both obsessed with sex and acting innocent. I remember something abouth the lady wanting to get married but none of her past relationships worked since she had sex with her partners right away or something like that, then one of her sisters gets engaged and she tells her the secret to the ring which is acting all innocent. This is all I remember, please help me! 😢

‘Ecchi Shitai’ to Itte Kure – Seijin (?) Buchou to Junshin (?) OL
https://www.mangaupdates.com/series.html?id=176453