First meeting ever, introduction
First meeting today
Lines for halloween, valentines, christmas, bunny day, new years etc.
She gives you chocolate - the cheap one, normal, expensive, self made
Enter a room she's in, you've greeted her today
She enters a room you're in
Someone enters and "ruins mood", disabling some actions
Greet in passing, ignore, stop if encountered on the way
Spotting you on a date with someone else (special dialogue depending on relationship)
Her finding you fucking but not joining, option to be hurt/dissapointed, specific character responses, etc
Her joining you and someone else, specific character responses
Someone finds you and runs away
Someone else joins in sex

Get hate/lewd/pleasure mark 1 2 3
Random actions she'll do to you if at yearning and not busy - she hugs you, blows air into you ear, reaches for you, grabs your butt, stares at you, shows off cleavage, etc.
Drinking with her during banquets (does anyone even have lines for it?)
Request dialogue - find who dropped Z, find my X, beat up Y, give me wood/fish, vent, "relieve my stress" - reject her, accept, tell her you're not doing it after accepting, fail, complete it
Her discovering you have food
Her discovering you have panties (unique dialogue for various feelings towards you?)

Visit room - nobody's home, talk a while, she's annoyed, drags you out to date, caught masturbating
Go to her room (lovers), leave room
If masturbating, run away, watch, "help out", her getting mad at the suggestion, and another set for staying with her for the day if lovers
She asks if she can stay over in your room today
She asks if she can move in to your area (once a month thing, I think)

Conversation options (this needs a lot, for every possible state)
Serving tea, it's good, it sucks, perfect
Serving tea/food spiked with aphrodisiac (or love pot or other) - drinks it/refuses to drink
Skinship (this needs a lot too)
Pinch cheek
Headpat
Give alcohol
Belly caress - if pregnant unique lines, if full of cum she usually orgasms from it
Give lap pillow
Get lap pillow, skinship during lap pillow, which has unique variant
Headpat, kiss after headpat - unique variant
Skinship in bath - you guessed it
Hug
Kiss - inexperienced, french
Kiss more - taps your shoulders, keeps kissing greedily
Take first kiss, maybe give first kiss
Confess - accept/reject
Flip skirt - no+counter, no but she's happy, no but doesn't resist, does it herself
Clothing change
Child interactions - baby, kid, teen
Relax in bath
Cleaning
Resting
Danmaku duel - win/lose, lost life, player lost life, item reactions? Like for bombs or king crimson?
Bug battle
Open street stall
Apologize after making her mad
Listen to complaints - give cakes, remove bad mood, failure
Praying - for kids, for lewdness, for less sadism, for pink wind etc.
Leading her around
Go on a date
Her proposing a date upon seeing you
Going out without her

Going to date location
Unique responses for going to date in certain places(eg. Shinmy usually has something to say about wherever you go)
Hold hands
Lead by hand (walk faster)
Detour (walk slower)
Date options (stuff like souvenir shop, good/bad gift, meal or village's candy shop I guess)
Going to love hotel
Date ends
She gives you a gift
Christmas gift
First kiss post date
Confession post date
Maybe several for if you refuse the first time, or if you already have lover(s)

Going to sleep with her
Her talking in sleep
Waking up next to her (some girls will wake you up with a bj at some point) (Oh and possibly add lines for her just being in your room when you wake up, non sexual)
Cooking with her
Eating with her (good meal, average, food sux)
Training with her
Playing music for her (good/bad performance)
Studying with her (she teaches you something, she's impressed with your knowledge)
Mixing with her
Hunting/trapping with her
Logging with her?
Drinking with her (drunk dialogue?)
Fishing with her (caught something, nothing, wood, moriya lottery)
Foraging with her (some characters even have lines for finding specific materials, I think even specific foods but that's honestly a waste of effort, just make it general found something/nothing)

Work without you (idle lines like Meiling sleeping/kicking ass/agitated because of pink wind)
Join in work
Join in actions she does on her own instead of you initiating it, like meal, cooking, making a snowman, relaxing, deep thought, kotatsu, experiment, cleaning, training, digging a hole, playing around, foraging, drinking exercising,
Possibly all that having idle lines on it's own if you interact with someone else or look at the sky

Push her down
Push down, rejected
Take to secluded spot
She's attempting to push you down - low sex frustration, medium, high, 100%, one for the option that makes her combat check you for it
Pushed down - extra lines for heat?

Responses to being tsp raped, with cum in/on her, orgasms, tsp rape mark, V-card loss?
Sudden pantsu evaporation
Pink wind reaction (some chars just call it out as a weird weather, some have unique meeting/conversation/skinship/lap pillow/push down etc. stuff replacing normal lines)
Beast youkai/animal ears pill causing her to go into heat because it's dangerous day
Other molestation outside of sex - breast caress, butt caress, fingering, clit, asshole

CVBAM orgasm responses with strength 1/2/3, lactation on B orgasm, possibly something for achieving 4/5 at once
Cum in vag, cum in ass, cum on face/boobs/thighs/hands, cum in condom, cum in condom inside her but she's semen addicted (X's vagina aches with frustration as it expected to be filled)
Same for normal sex, and commands like footy, handy, bj, paizuri, sumata, caress, toys, boob fondling, ass/vag spread, paizuri+blowjob, double blowjob, etc.
Virginity loss
Virginity loss, player
Nipple sucking with lactation tag
other like rope, blindfold, apron, give her a pill, aphrodisiac, ovulation drug, cleaning during sex
Ask for raw, rejected, agreed, push again, declare unconditional impregnation
Positions, alternate insertion, cervix tease, g spot, g spot through anal, various sex dialogue for various states. That's for player leading.

Her suddenly taking initiative
Commands ai can try to make during sex - kiss, hug, lift skirt, nipple play to player, same to her, boob caress, boobjob, start doggy/missionary/cowgirl, etc.
Don't forget the unique lines like 'noticing you're close she wraps her arms and legs around you in an iron grip' or 'tears of joy trail down X's face as she rides you', or virginity loss for every position
Virginity loss, player
Unique lines for wanting to fuck raw during her lead - do you want to make a baby, completely lost to her female instincts, x utters a 'sorry' before starting to milk out your semen
Surrender, resist, kiss, move hips steady/rough/grind, touch boobs/v/c/a etc.
Be at mercy

Attempt to get away when she's over 50% frustration - success, failure, use tsp
Slip out
Finish session when leading
She's satisfied and ends sex - option to ask for more
Try to slip out after asking for more
Dialogue for when you run out of stamina and faint
Line for when she's fucked to unconsciousness

After going to sleep
Gift examination - if bad she sells it, she puts in on a shelf, she falls asleep clutching it
Masturbation - normal, yearning, love, developed b/c/v/a, sniffing your clothes, rubbing cum into her, you're sleeping next to her, she refuses to masturbate to fuck you tomorrow, ignorant masturbation (desk corner, book, propably more)
If it's been some time since she last saw you (no idea how that works, over a week?)
Randomly thinks of you and decides to visit tomorrow

Acquired sex friend
Acquired lust
Acquired yearning
Acquired love
Impregnated
Updates on pregnancy - X tells you she's blessed, belly is quite big, looks ready for birth, Congratulations! It's a boy/girl!
Events like first toy, goes to school, praised in school, beating up other kids, growing up etc

Hard mode: 
Diary entries and the peasant thing if even possible
extra actions like the wingjob/tailjob
Slip out if player is a virgin - she will beg to have your first time