Other people have already mentioned them but just FYI for anyone struggling to get all the endings (since for some bizarre reason the Lewd ending took me awhile this time around):
Ending 1 - Normal
Story 2 or Story 3 - Just seggs her whenever you win a round in either Story Mode 2 or Story Mode 3. Dialogue's irrelevant.
The normal ending will always start the post-match dialogue with her saying 一度、二度... (not once, but twice) so if you wanted other endings just mash through it and take the points.
Ending 2 - Lewd
Story 2 only - tl;dr 1-1-2 you need the 'choose-her-attack' option unlocked and
you both need to orgasm at least twice before the round KO H scene every round (that means prompting her to gibb handjob and footjob + face-sit + cowgirl sex). In case you can't spot the visual signs, the orgasm dialogue is the one with 3 hearts followed by red text during the climax.
Pre-fight: dialogue 1
Post-R1: Have sex - 1
Post-R2: Have sex - 2
R3: Make sure she red-text orgasms during Cowgirl sex as well as in the final round KO H (doesn't matter which H scene you trigger to finish the final round KO, climax multiple times per scene for good measure).
You'll know you've got the lewd ending when she starts the post-fight dialogue with "なぜこんなクズに勝てないのよ…" etc. and your reply is "お前の身体が負けた… your body has already admitted defeat" etc. or something like that. Also, I don't think as a pre-req you need to kiss her or make her cum any other way other than the Cowgirl and sex, but it can help you by maxing out her heart gauge with the groping (just mash on the breasts) so she orgasms quicker during sex.
I'm sure there's a quicker way to get this one, but I kinda just got bored and brute-forced it doing the above.
Ending 3 - Obedient/Sub
Story 3 only afaik - tl;dr you gotta pick the right choices and lose the 3rd round.
Post-R1: Have sex - 1
Post-R2: Have sex - 2
R3: Mid-fight get her to Cowgirl ride you, then grope and max her hearts, then lose.
When you lose you should get a dialogue where your char will hit the JRPG protagonist classic (.......) multiple times.
Ending 4 - Love
Story 3 only - tl;dr 1/1-2/1-2 no fun allowed
Pre-fight dialogue: 1 (don't think it matters much which pre-fight)
Post-R1: No fucky - 1 (君は元チャンピオン…) then 2 (決して君を侮っている…)
Post-R2: Don't do it - 1 (全力を出して...) then 2 (同じ闘技者なんだろ...)
R3: Stay celibate at the end. If your character doesn't talk much post-fight you've missed the ending.
Goes without saying but Story Mode 2 is unlocked by choosing to pound her when you win any round in Story 1 whilst Story Mode 3 is unlocked by... not doing that (choosing Top option/Miss when you win).
ngl hope Studio JSK shakes up their formula with the next release... For all the new scenes in this one there's still 'missing content' from previous releases (e.g. more clothing/costume piece options, more creative ending routes and extended ending scenes, more than 2 counter H attacks and more creative H attacks in general) and the last couple 'fighting arena queen' ones have just kinda been re-skins with different hair and costumes. Heck, even body part color and boob sliders would be
something.
Still, they're consistent af for a DLsite dev. Not many put out 2-3 releases
a year so happy fapping for the rest of us, in any case
