As far as I've explored there's six (counting the "kiss them" / "let them kiss you" as separate variants). One pair is when you cup their cheek, another is if you call their name then grab their wrist, and another is if you call their name then make an excuse. My personal favorites are the cup their cheek options and make an excuse / let them kiss you, but they're all sooo good!!
Oh I totally agree, it's so sweet just letting Blane know they're cared for without pushing the physicality of it too quickly. At the same time, it's so cute seeing them fully embrace it, especially when they initiate the kiss--it's so rare for them to even accept physical contact, much less do something so impulsive. Something about pouring their emotions into the kiss where words fail them is what gets me.
K soldiers have nothing but my utmost respect, I could never. At least, not until their route is a bit further along, being constantly left on angst cliffhangers would kill me :( o7 to you guys frfr