Ruby couldn't figure out why Amon was fighting Meia in the end, but it didn't seem like he was going to fight to the death and let them go, and he returned to the lab to continue developing a vaccine for the plague.

Time flies, Ruby buries his head in the laboratory for another day and night, the development of the vaccine is not going well, and he has never found a drug that can effectively engulf the virus.

When Ruyue pushed the door and entered Lubi's room, she saw Lubi lying on the table and already asleep, the air was filled with a faint fragrance, it was a cup of coffee on the table, it seemed to be used to refresh himself, but he was tired before he could take a sip.

Ruyue's mood is very complicated, she also wants to help Lubi take a little pressure, but she can't be as smart as Meiya, and she can't risk everything to protect him like Amon, now all she can do is to can't bear to let Lubi sleep on the table, move him to the bed to let him rest well, but when she picked him up, she accidentally knocked over the cup of coffee, and the black liquid flowed around on the table, which also woke up the sleeping Ruby.

"Miss Ruyue, I personally don't like to be hugged by princesses."

After finding himself lying in the crook of Ruyue's arm, Lubi complained silently, the sword-wielding girl has been practicing swords all year round, and it is naturally easy to pick him up, but the posture is unacceptable.

"I just want to carry you to bed."

Ruyue smiled, put Lu Bi down gently and let him stand up, and could only be annoyed that he was clumsy, and he couldn't even do this little thing.

"This coffee..."

Rubi wanted to clean up the coffee on the table, but stopped in the middle of speaking, and seeing his frowning appearance, Ruyue thought he was angry, so he could only bite his lip tightly and say nothing.

Who knew that Ruby was not angry, but just picked up a piece of glass on the table and rushed out of the room quickly, Ruyue followed for unknown reasons, and when he came to the laboratory, he found that Ruby was looking intently at the thing called a microscope.

"What's wrong?"

Ruyue saw that Rubi's body was trembling with excitement and asked strangely, is that cup of coffee so chic? The road is more angry than the one trembling.

"There is a drama, such as the moon, and the vaccine has a drama!"

Ruby took his eyes off the microscope and pointed to the piece of glass excitedly and said, he had planned to bring the virus back to the room to study it, but he didn't expect the virus to be spilled by the coffee began to change significantly, at first he was not sure, until he put it under the microscope and saw that the viruses were inactive, he determined that this was the effect of coffee.

"Huh? What the? ”

Ruyue looked at Ruby stupidly, still unable to understand what he meant.

"Coffee, it's caffeine! Caffeine is a drug that can devour viruses, and thanks to the spilled coffee, Ruyue is really a lucky star. ”

Rubi hugged Ruyue excitedly, his arm was only around the girl's thin waist, he was so happy, the successful development of the vaccine also means that the 100,000 dark elves are saved, and they can also wash away the suspicion of spreading the plague, all of which is caused by Ruyue's unintentional mistakes, after all, even he would not think of using coffee to kill the virus.

"Yes, is that so?"

Ruyue couldn't help blushing a little when she was hugged, but when she heard Lubi praise her so sincerely, she became happy again, and it seemed that she had accidentally become the person who contributed the most here.

'Click'

At this moment, the bright laboratory suddenly darkened, and the switch of the lights was turned off by someone, and the dark environment also made Lu Bi a little calmer.

"I'm sorry, I'm so excited."

Rubi realized that he was still holding Ruyue's waist, and was silent for a while before slowly letting go, Ruyue was able to come out of his arms, and there was no longer that oppressive feeling in his chest, and only the breathing of two people could be heard in a quiet and dark environment, as if as long as one of them was willing, he could do something further.

"It's okay, it's good if it's successful."

Ruyue's eyes glanced at the edge of the switch, her eyesight was different from that of humans, even if it was pitch black, she could see clearly, and this time she saw the sneaky magic sword, and after finding that she was exposed, the magic sword immediately slipped out from under the crack in the door.

Ruyue opened the door without saying a word and chased after her, and soon after hearing the screams of the Demon Lady Lady, mixed with something, "I'm helping you!" Don't you be shy when you turn off the lights! ' and other last words.

Lubi began to study the effect of coffee on the virus carefully after Ruyue left, of course the coffee in his hand is not a product of another world, the sacred continent has a coffee tree, but people from the other world can't roast and grind coffee beans, so naturally they can't make this kind of drink, Ruby's first coffee tree seed is still burst out of the monster-shaped grass, and there are still coffee trees he cultivated in the back mountains of Dris, but there are not many plants, and he usually makes a little drink by himself.

The maker of the plague virus did everything he could, and he tore all the hair on his body to develop this basically unsolvable virus, but he didn't expect it to be cracked by a completely inconspicuous plant in the Sacred Continent, and after more detailed research, Lu Bi found that the dark elves secrete an enzyme that humans do not have, and this enzyme can be well combined with caffeine to form a cell that specializes in restraining the virus, which is called one thing to one thing.

As for the side effects, do you probably wake up and become fond of coffee?

"What do you say, the vaccine has been developed?"

Meia got up from her throne excitedly, she hid since she was found by Amon by stealing a kiss, ready to apologize after Amon was discouraged, she was still a little incredulous about Ruby's words, she also learned from history books about the plague, which time was not full of corpses? Even if there is a vaccine, it only appears after I don't know how many people have died, and Ruby has developed a vaccine in just one week, which is simply not something that people can do.

"Well, it's a coincidence, but there's a problem, the number of vaccines is not enough, and I need your help me to grow this plant in large quantities."

Ruby spread out his palm, and there was a coffee tree seed lying inside, and even he couldn't help but be glad that he had unconsciously let Dragon help keep the coffee tree seed, otherwise he wouldn't have enough coffee beans to treat so many people.

"No problem at all, as the War Ancient Tree gradually awakens, our cultivation place can also be used, I'll go now."

Maya carefully took the seed, fearing that it would break, and gave it a few protective spells before taking Ruby's hand and carrying him to a certain level of the Ancient War Tree.