Here's what I could gather through the Google translator. I can ask a friend who has more Japanese proficiency later if you like.
Self harm warning: mouse over the spoiler if you want to continue...
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The game is about guiding a suicidal friend (that the game calls a nuisance) after your girlfriend asks to come over to play. I will refer to the one on the left as "you" and the one on the right as "friend."
First choices: "My girlfriend is coming over" or "What shall we do today?"
The friend replies with "thinking of manga until I die" or something similar, then "it's not OK until I die." He breaks down and you then ask if he's okay.
Second choices: "She's coming over to play," "Would you like a drink?" or "Would you like some water?"
The friend replies with "damitasse," which is a type of coffee cup. Apparently it's a coffee drink in Japan.
Third choices: "It's 120 yen," "It's 120 yen, but it's money,"(?) or "Give me 120 yen." Strangely, the yen symbol isn't used here.
The two argue that you shouldn't have paid for the drink without asking.
Fourth choices: "Seriously!" in different tones of voice (shuddery, seriously or sadly)
The friend says that he'll go home later.
Final choices: "Goodbye," "I'm lonely," "It's okay," "Be careful," "I love you," and three names(?): "Kamehameha," "Palpunte," and "Masashi Suwa."
The friend leaves. You then call someone (your girlfriend?) and tell them that you can't make it, instead having plans to hang out with your friend instead. You then call someone else to invite them over(?).
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