Eee!

Very good reaction! She will keep this up.

Then Tetsuma will keep being delighted! 

She wonders how much exploring Tetsuma will let her do...

A good bit. (Tetsuma's been so frustrated this whole week and is rather happy to let Dayo lead.)

Anything very adventurous will leave Dayo having to support her girlfriend's weight as she melts into a blushing, giggly mess.

Yeah she's gonna be extremely adventurous here.

Then she'll very quickly end up with an incoherent mess of a girlfriend. A happy incoherent mess.

This whole swimming thing was a very good idea!

Tetsuma sure approves of the outcome. She then starts trying to unscramble her brain enough to reciprocate properly. 

Reciprocation is very welcome! Dayo can fill the time by making Tetsuma's job at unscrambling her brain harder.

!!!

Yep. Omnom delicious girlfriend.

If Dayo starts nibbling she'll have to entirely support her girlfriend's weight, as she collapses in giggled accusations of cheating. 

She will magnanimously admit to these accusations.

Dayo is so unfairly pretty and amazing and kissable.

And has a very good memory for which places and actions cause the most melting!

Ahhhhhhhhhhhhhhhhhh

(Tetsuma's girlfriend is perfect and deserves lots of kisses. Kisses in somewhat adventurous places, even. Tetsuma expresses this opinion rather thoroughly the next time she regains higher brain functions.)

Eeeeee! Dayo is very vocally appreciative!

Good!

She can keep at this for a rather long time.

Eeee! Tetsuma is fully on board with that plan.

(Depending on how long, eventually it'll start getting close-ish to lunchtime. Tetsuma's stomach announces this with a rather loud grumble, provoking an impressively deep shade of red as she buried her face in Dayo's shoulder.)

She giggles. "I suppose that's our cue to stop kissing and go eat."

Tetsuma giggles a bit and blushes, but says, "Probably," and disengages to head for shore. 

They have: bread, olives, a few varieties of cheeses, two oranges, and a clay pitcher of cold tea. The pitcher is covered with runic symbols that the translation spell can't decipher.

Oooh cool. She bets it's magic. Is it magic?

Almost certainly, though Tetsuma forgot to ask for details when she got it. They can find someone to question when they return?

(Experimentation will reveal that the symbols are cold to the touch, and once they've drunk some of the tea, faint corresponding symbols become visible on the inside, which are ice-cold if poked. Small, less cold but still chilly lines radiate out from them.)