Main Scenario/Undersea Corridor

Flamarine Episode
9-1	Secret Trial Under the Hot Sun
9-2	Express Train
9-3	The Imprisoned Princess
9-4	Undersea Corridor
9-5	Echoes Below the Depths
9-6	Rescue
9-7	Whirlpool of Doubts
9-8	Pagan Ritual
9-9	Toe the Line
9-10	Catch of the Day

After that... The train rumbled along at full speed and reached near Flamarine's coast. From here it is only a short distance to the destination, the Underwater Temple.
Putra	"TAKE 'EM TAKE 'EM TAKE 'EM～!"
Gillman	"GULP GULP～!?"
Yakutsk	"Oooi, get lost! How many are there even, these gillmen? It's a beautiful place, but I can't even afford to enjoy the view!"
Queensway	"Hmhmm. It really is a dream-like, beautiful place. This place is commonly known as the Underwater Corridor - as the name suggests, it's a corridor that exists under the sea leading to Flamarine Underwater Temple?"
Naypyidaw	"Mhm. It's a long tunnel made of a transparent mystery material in all directions. We can't enter it by train because of its size ―― We can't reach the Underwater Temple without passing through here, so let's proceed on foot."
Yakutsk	"What's the mystery material?"
Naypyidaw	"No, we don't know what it is either. Just like the underwater temple we are going to ―― We are using the ruins of an ancient civilisation that died a long time ago, and we are using them for our own convenience today without really understanding them."
Yakutsk	"No, you really should do some research to understand it properly... Why are Flamarinians so sketchy in general?"
Putra	"Eisengrad is too nitpicky～... But more importantly, Yakky-tan, are you sure you want to wear such thick clothes? You don't like heat, and here's an enclosed space, so it's even steamier from here onwards, right?"
Yakutsk	"Uweeegh... I'm already hot and sweaty at the moment."
Naypyidaw	"Shall I use air-conditioning magic? It's impossible to bring cool air to the entire undersea corridor, but I can manage around me, you think...?"
Queensway	"No, you should conserve your magic. There's a constant stream of gillmen attacking us ―― We can never know what might happen from here."
Queensway	"It's no wonder we were forced to march, but we don't have enough forces here. At least until the reinforcements arrive, we should try to minimise wasteful exertion as much as possible."
Putra	"Mhm-mhm! I can rely on you, Naypyidaw, the strongest court mage! If we fight, our body temperature will rise anyway, so it's a waste, so use attack magic instead of air conditioning to defeat the enemy!"
Naypyidaw	"Ahaha, I'm not the strongest in the world... But something more important than my life is at stake, and I'm willing to die for it."
Naypyidaw	"The rest of you keep going straight ―― we'll reach the Underwater Temple soon. I'm going to stay here and try to slow down the schools of gillmen that are chasing us."
Yakutsk	"Wha? No no, you can't do it alone, can you? I've managed to bust my way through, but you can't deal with just 100 or 200 enemies, right?"
Naypyidaw	"Mhm. Myselves are also one of 'em rowdy Flamarinian folks, so I'm good at 'taking them all down at once'."
Naypyidaw	"Go on. I'll use myself's magic and make a temporary hole in the undersea corridor ―― and fill it with magic-filled water."
Naypyidaw	"If I can turn that water into venom that only affects gillmen, they won't be able to resist and will be wiped out in seconds."
Queensway	"Oooh... You use surprisingly terrifying magic, despite your cool speech and behaviour?"
Naypyidaw	"Mhm. But it's efficient, right? It's not venomous for you all... but without Mermaid Blood you can't breathe underwater ―― so move on before you get caught up in my magic."
Yakutsk	"Mermaid Blood?"
Naypyidaw	"Ah, it's the noble blood of the Flamarinian nobility, similar to what in Eisengrad is called the Ancient Great Blood, or something like that... is that clear? "
Yakutsk	"Aah, Fussen was bragging about inheriting that kind of blood. Do aristocrats everywhere have that kind of special blood...?"
Naypyidaw	"Depending on the country, the authority held by inherited blood varies. Those who inherit Mermaid Blood can breathe underwater and talk with sea creatures."
Naypyidaw	"My elder sister and younger sister are also members of a noble family who inherit Mermaid Blood."
Naypyidaw	"Not myselves, though. I would be too stupid to die from my own magic, and I have defensive measures built into my magic formula――"
Gillman	"GULP GULP! GULPGULPGULP!"
Naypyidaw	"Oops... Gillmen instinctively senses the danger and they rushed forward. Hurry up, we don't have much time, everyone go quickly."
Putra	"Uh-huh! Naypyidaw be careful too! I'll be waiting for you just after you enter the Underwater Temple, so join me us soon as you defeat the enemies, okay?"
Naypyidaw	"Mhm. If someone is waiting for myselves, expecting me ―― Myselves will never betray their trust."
Naypyidaw	"'Me too～!'"
Queensway	"...... What was that?"
Naypyidaw	"Ah, sorry. My lil sis came out for a bit. She's better at magic than me, so she helps me when I use difficult techniques."
Naypyidaw	"We can do things with my sister that I can't do alone. I'm not alone, so no one can beat us."
Naypyidaw	"Here I go! Sink and drown in a sea of venom, you monsters who take revenge on Flamarine!"
Naypyidaw	"'Yea~yeah! Let's do this let's do this, big bro! Prepare yourselves, you smelly creatures, Flamarine will be protected by us, us siblings...!'"

Flamarine Episode
9-1	Secret Trial Under the Hot Sun
9-2	Express Train
9-3	The Imprisoned Princess
9-4	Undersea Corridor
9-5	Echoes Below the Depths
9-6	Rescue
9-7	Whirlpool of Doubts
9-8	Pagan Ritual
9-9	Toe the Line
9-10	Catch of the Day