SPOILERS. . . . . . . . VOLUME 2 Last Ball where she meet Duke Maze and Crown Prince Picn...

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Volume 3
New year and coming of age of Yus. Ran handed him the estate
Yus and Ran talked about the condition of staying and Yus confessed
Yus sealing ceremony. Ran's snow storm accident and Yus got worried
The emperor died, Crown price sht Ruth has been appointed as the new emperor
Yus leaving for capital for empire's approval of Lachia new duke and Ran's new title as countess. Yus decides to left Ran in Lachia to avoid her meeting shty Ruth
Ran visits the water bridge on going construction in Lachia
Yus kneeling in the imperial palace to gain the said approvals. Talk with Olivia
First attempt to kill/kidnap Ran. Ran doesn't know as Dia, Rumi and Blaine handled it quick.
Marquis of Kirix visits Lachia as Ran secretly entering the mansion
Ran's surprised visits Yus in green arch
Yus heads to the imperial palace
Ran talks about the empire and the attempted kidnapping
Ran's accepted Yus feelings and decides to date Yus
Ran and Marquess of Kirix girl talk
Devan and Olivia plotting kidnap and murder to Ran
Preparing for a ball where Yus has an urgent matter to empire first and will be late in the party
Yus meets Ran in the party. Yus got jealous as Ran was surrounded by the other noble men
A party game where you need to find your destined partner through the flashing lights of a crystal
Yus and Ran meets at the garden where Ran is hiding. He found Ran through the flashing crystal light
Second assassination attempt
Yus and the viri. shadow deals with the assassination guild and found out that the empire hire them
meet with the previous empress katia
Ran told Rumi to stopped being her knight. Rumi confessed to Ran.
Ruth the new emperor died. Olivia plotted it.
Going back to lachia. Kiri from viri. shadow came in as Ran's maid/knight as well.
Yus goes off to chased down beasts
Yus and knights battle with beasts
Winter hunt. Ran is searching for the article of ivria and the crown. Ran talked with istarrif
Banquet upon returning from winter hunt
Ran tells yus that she know how the spirits work, names and the effect upon calling them
Sealing ceremony. Sina is coming.
Ran captured by the flying beasts and dropped from above (Basically Ran will be so dead but manage to stay alive and blinded for a week)
Ran and Sina talked. Sina tells her story to Ran and Ran says that she will help her to get back to her world
New Year banquet. Ran was feeling jealous or sad when she saw Yus and Sina dancing happily, and when she saw the 3 main characters all together talking. She thinks that the flow of the story now will be alright when she comes out of the picture.

SPOILERS
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VOLUME 4
Ran avoiding Yus to follow the fate and flow of the Story now
Playing in snow with Sina, Rumi and Yus. Still avoiding him. Yus can't stand it anymore and capture Ran
Ran's captured and they go to the mountain hut to talk with no one around
Snow storm so they are stranded, Ran talked and confessed everything to Yus, about the story from the beginning and the other world
Ran and Yus engagement
Olivia plans to kidnap and torture Ran because she did not get what she wants which is the Lachia and Yus
Ran and Yus arrived in the green arch
Ran and Sina planning for the party
Yus and marquis of kirix met at some social party for men for some story and marquis of cameron attacked Yus, but still, didn't win
Rumor that Ran got pregnant with Ruth child
Ran and Sina visits a wizard assoc. to find more knowledge on how to get Sina back to her world
Rize meets Sina and Ran
Baron Chloe, the one who spreads Ran's rumor and backed up by Olivia, came to the green arch, cries and beg for forgiveness (Well Yus threatened her so)
Former empress katya garden party
Ran was hypnotized by some clan, regarding flying up in the sky on first full moon and was kidnapped
Yus go to Ran and both captured and injured severely
Olivia came after they dock in an island, tortured Ran a little bit while Yus watching
Knights came, a battle afterwards. Olivia run to escape. While Yus is kinda scary because he is so angry LOL
Ran was taken care of. but still kinda lost her mind and asking when will be the full moon rises
Yus visits Ran to her room and as Ran request, they sleep together
Arrived at green arch mansion. Sina, Rumi and Ran talked.
Full moon accident came. So Ran, out of her mind, go to the highest part of the mansion. Flying up the sky by jumping and Yus got her before she step. Ran was so anxious because of this hypnotize while Yus soothing her.
Ran recovers and visit marquess of kirix and when going home, got attacked by the duke of maze (declaration of War)
Yus talked with Ravel the new emperor. Preparing for the war.
War begun. Marquis of kirix visits green arch and tells that he will join them and the reward he wants is the Duke status and swallow the estate of the marquis of cameron. An alliance.
Ran and Yus part ways back to lachia, they think that they will target Ran as Yus weakness. Ran and Sina was on a different road with Marquis of kirix as their lead knight
While camping back to Lachia, Sina and Ran resting and Sina told Ran that she like Rumi.
Still on run back to Lachia, passed on 1st gate and will be resting on the 3rd gate (Lachia estate has 5 gates, and each gate has 1 vassals as looked out. on 1st gate it is Wilde, while 3rd is Illuminity)
Climax of the battle. So, Ran's shty uncle gets back and guarding the 5th gate (but Yus has an idea what are they planning LOL). Ran's uncle, marquis of cameron and duke maze joined forces.
Battle ended. Yus and knights go back home to Lachia.
WEDDING of Ran and Yus
Talk about the deal with Ravel about Lachia being a independent kingdom
Ran and Yus vacation escapade
Yus go to the capital to report the war outcome to ravel while Ran stayed at Lachia to manage the work
Ivria came in Ran's dream

Btw someone said the second male lead did something very bad. Is it true.

Thank you sooo much for all the spoilers

it's not the second male lead but that male attendant of yus..

thank uヾ(☆▽☆)

Wow lots of kidnapping

Wow! I might die before the story ends in manga :D