Cute.

Adorable. ^_^

Looking for something similar to Semelparous action wise. Would like the characters romance to start early. Some kissing, ecchi, or plot even better.

There's the excellent Mermaid Lovers, but due to an early axe there's sadly only the fist volume translated.
And Liberta, of course.
Gunbured x Sisters
Maybe also Innocent Devil.
And not available here, the amazing "Omae Gotoki ga Maou ni Kateru to Omouna" to Yuusha Party wo Tsuihou sareta node, Outo de Kimama ni Kurashitai the Comic

Nice!

So hot, I was worried for my computer for a bit there.

Last chapter of the volume, but it doesn't really feel like a last chapter... Maybe I'm remembering wrong and there is another volume after this?

Just one more extra chapter to come.

A lovely ending with a rather unique way of presenting their future. But I'm sure it'll come true, Momiji has learned a lot in Koharuya and is still learning more, and she has excellent help to rely on as well. ^_^

Nice catch!

Lovely. ^_^

Perfect. :D

Cute.

Heartwarming. ^_^

Beautiful.

Adorable. ^_^

Cute.

Lovely.

Nice. :D

To bed!

Nice

Good.

Nice. ^_^

Adorable. ^_^

That's that last bit of uneasiness solved as well. ^_^

Good job, kid! ^_^

Kao-chan still the best little sister. ^_^