IxSHE Tell

The protagonist Junjiro was pessimistic and unhappy as a child because he was born with a weak body, but gradually regained happiness due to his best friend Yousuke who was always by his side and supporting him.
Shiori, who met them during school was also saved by Yousuke.
The three became good friends, but eventually Junjiro fell in love with Shiori. However Junjiro also noticed that Yousuke had feelings for Shiori too, and unable to control his own feelings, Junjiro told Yousuke how he felt and got him to help confess his love for Shiori and started dating.
As time passed, Junjiro and Shiori married and moved to the city. Junjiro eventually became concerned that he couldn't satisfy Shiori at night due to his physical weakness.
One day, Yousuke came to their city for work, and Junjiro who wanted to pay Yousuke back for his help in the past, forced him to stay with them rather than rent an appartment.
Afterwords, when Junjiro returned home from a business trip, the usually passive Shiori, shown him sexual skills that he had never seen before. Worried about why his wife suddenly changed after being left with their friend, on his next business trip, he set up hidden cameras in the house. However, nothing was shown on them and he became deeply ashamed that he suspected his wife and best friend.
But from there her mood and behavior seemed to change. Is it his imagination, or...

A man the protagonist doesn’t know. A man the protagonist knows by sight. A man the protagonist knows well.
Depending on your actions, the women of the Kurumisawa family, whom you cherish, may end up spending time with these men.
Sometimes they use methods you would never imagine, or they slip into the vulnerabilities in the heroine’s heart.
They skillfully manipulate the heroine’s guilt and desire for self-expression.
When will you realize how these women are being corrupted without your knowledge?

"I finally finished my overtime work! "
Having finished the overtime work imposed on me by the power-harassing manager, I rewarded myself with a night out on the town. When I arrived at the hotel district and strolled around in circles...
I couldn't believe that I would see my senior in the same department in such a place. My curiosity kicked in, and I keep distance to check on Remi. After a while, someone approached her.
The person Remi was waiting for was that power-harassing department head! I took out my phone and recorded until the two disappeared into the hotel. Then, as I looked back at the footage I had taken, I began to formulate the worst possible plan.
"This is it... I'm going to do it... hehehe..."

Seiki was currently living with his in-laws.
With the current situation, his days of remote work continued.
The cause of his current distress was the decline of sex with his wife.
Furthermore since multiple generations lived under one roof, it was difficult to find the timing to masturbate.
...In that case, the only choice left was to do it while he was working.
But in middle of the act, an unexpected visitor arrived.
Manae, his mother-in-law, who was supposed to have gone shopping.
And thus, without even having the time to fix his appearance, he was seen.