B6 Comics Invincible Future Grand Strategy (3) / Fuyuko Kurosaki Beam comics

Product description ※Please note that product information is not in full comprehensive meaning because of the machine translation.

Eiko is trying to get married to Yoshitada (Aida), a millionaire saint, for her mother's sake and for a living.
As you get along with each other, the comfort changes into something special.
What is the invincible future that the two choose after all the romance patterns?