As I mentioned in the introduction post (HERE), I've decided to keep track of the correct answers for the characters from the iPod's otome game "Shall we date?: "KONKATSU" for marriage" since I haven't been able to find a guide on the net. This post will be the walkthrough solution for Toshihisa Mikumo

I absolutely despised this character and his storyline. He was the most psychologically messed up where he used his work to compensate for his past failed marriage that he had... Which is ironic considering how he is a staff member from the marriage matchmaking site to help others get married. You would think that because he works there, he'll have more romantic notions, but au contraire, he's very boring and mundane. Generally, there are e-mail exchanges that your male suitor sends to you throughout the story, Mikumo only starts sending it to you at the last two chapters in the game... His story was a big disappointment
 
Here are the photos associated with Toshihisa Mikumo from his album:


His letters to you (which are sent to your mailbox by the end of the chapter) are as followed:


Despite there being three endings associated with each character, only the happy ending (which is referred to as Happy Wedding) will be the only one meriting an event picture. The two other endings (normal and bad) do not have pictures linked to them. This is the picture rewarded to you if you get your Happy Wedding with him. Summary of the ending will not be provided to avoid spoilers of this endearing ending


Please remember that you can obtain the Happy Wedding in this game as long as you choose the correct answers. Unlike with the other characters in the game, Toshihisa Mikumo is a staff member whom is part of the marriage matchmaking site so you do not get to choose events to attend. Therefore there is no worry that you might not be able to complete the character's album because you went to the wrong event 

In order to get the Happy Wedding, you must select these answers (with some variation, but this is guaranteed):
Yeah
But I’m envious
Actually, I’m not…
You enjoy it
Yes, please
Your cheek okay?
I get it
Good work
That’s for sure
No, I don’t
She was worried
I’ll do it now
You’re right
Better this way
Thanks, then
S-Sorry!
That’s sad
Because of you?
Wanna be close
But you called
I’ll help you
… Yes

That's the end of Toshihisa Mikumo's route~! 

Please do not repost this without my permission or claim this as your own as it took me a while to get these answers!!

Other Walkthrough Solutions:
Keito Yuuki
Momoki Yukimura
Nakaba Kasumi
Rintaro Washio
Takuma Chigasaki