C14 Dating (US)

Play 4:
Turn minigames off.
Start game.
Choice 7: That's all.
Notebook: Inquire (All Weekdays), Museum (Weekend)
Choice 2: Look down.
Choice 5: I think I got it.
Choice 1: I'm still deciding.
Choice 1: Your accent sounds different in English.
Choice 2: Volunteer for tomorrow.
Choice 1: Having trouble?
Choice 1: What are you taking in school?
Choice 1: Let's Party.
Choice 2: Now that he mentioned it...
Choice 2: Get permission before handling.
Choice 2: Of quartz I like cake!
Notebook: Left Column - Cave, Lab, Cave, Cave, Lab
Play
Choice 1: Volunteer to talk to Kyler.
Choice 7: I'm good.
Choice 2: Figure it out yourself.
Choice 1: Ewwww.
Choice 2: Ask for it in English.
Choice 1: Pretty much yes.
Choice 2: Searching for pirate ships and sunken treasure?
Choice 1: Ask Hendrik.
Choice 2: Now what?
Choice 3: Teach him the soil test.
Choice 2: There's no other option than to hurl yourself down the slope.
Choice 4: Retire to the indoor lab.
Choice 1: Accept the offer.
Choice 3: Offer to do the dishes.
Choice 3: Make coffee first.
Notebook: Play
Choice 2: Inwardly panic over him working in the sqaure.
Choice 1: No, I was admiring his skills.
Choice 1: Say hello.
Choice 2: You seem rather calm.
Choice 2: He seems occupied, return to the tent area.
Choice 2: Wish her luck.
Choice 3: Admit to wanting small talk.
Choice 2: Ask about what happened.
Choice 3: You both have good points, but stop.
Choice 2: Stay with Hendrik.
Choice 1: Ask to take a look.
Choice 3: Agree he'll figure out what works best.
Notebook: Play
Choice 4: Hendrik should rock the dance floor.
Choice 1: Calm Kyler down.
Choice 1: Let it go.
Choice 2: Hendrik.
Choice 2: Can sorta see where Kyler is coming from, but...
Notebook: Play
Choice 1: Greet Deandre first.
Choice 1: Did you need something?
Choice 1: X 29, Y 53.
Choice 1: How's the elective going?
Notebook: Play
Choice 1: Talk to him.
Choice 1: Ask away.
Notebook: Play
Choice 4: ... tag along with you, Hendrik!
Choice 1: Accept the invitation.
Achievement unlocked: Hendrik Festival
Choice 3: Enter museum.
Choice 2: That it had some fascinating rocks.
Achievement unlocked: Dancing Hendrik
SAVE GAME 4
Choice 2: A walk around sounds great.
Achievement unlocked: Hendrik Friendship Chibi
Notebook: Play

Play 4b:
Continue
LOAD GAME 4
Choice 1: A restaurant sounds lovely.
Achievement unlocked: Hendrik Week 7 CG
Notebook: Play
Achievement unlocked: Hendrik Love CG

I show all Hendrik related achievements in my Achievement Walkthrough starting at 20:42 minutes into the video.
Timestamps:
(0:37) Kyler
(7:08) Deandre
(13:45) Shoji
(20:42) Hendrik
(27:17) Joan
(35:25) Group Photo CG