Why is he wearing that expression in Chapter 374?

The car slowly came to a stop in front of the hotel. As Shirai Mako was helped out of the car, she glanced at her hand, her expression changed, and she suddenly exclaimed, "Oh no! I think I left my cherry blossom bracelet over there!"

"Eh? But you're not feeling well right now, let's wait until you feel better before going back to look for it." Yamamuro Momoe supported her, and upon hearing this, she also looked down at her wrist.

"No, that's a symbol of our friendship! Please go and get it back for me, okay, Tao Hui?"

Shirai Mako pouted and rested her head on Yamamuro Momoe's shoulder, acting coquettishly.

"Alright, I really can't do anything with you. I'll go find it for you. Remember to take your medicine, okay?" Yamamuro Momoko shook her head helplessly and agreed.

Shirai Mako immediately chuckled, "I knew you were the best, Momoko!"

After saying that, she turned to look at Liu Qingyao and pleaded in the same tone, "Brother Liu, I'm counting on you to take Tao Hui there this time. I don't trust anyone else."

Liu Qingyao shrugged indifferently and nodded in agreement, "No problem."

Hiroshi Otsubo, standing to the side, twitched slightly at the corner of his mouth.

What do you mean you don't trust others?

Liu Qingyao and Yamamuro Momo returned to the car, while Shirai Mako, supported by Mouri Ran, waved to the departing car with a smile on her face. Her smile faded slowly only after the car disappeared from sight.

Her hand, which had been hanging down, suddenly clenched slightly, then quickly relaxed.

Noticing this, Conan tilted his head suspiciously, then looked up at Shirai Mako's face.

Her expression held a hint of suppressed reluctance.

Conan was even more confused.

Why that expression?

The group entered the hotel.

After Shirai Mako took her stomach medicine, Mouri Ran said goodbye and left her room.

Mako Shirai smiled and said goodbye to her.

After the room door was closed, Shirai Mako's face turned deathly pale, and she broke out in a cold sweat.

She clutched her stomach tightly, the pain causing her to convulse slightly.

After lying face down on the bed for a while, Shirai Mako struggled to get up, panting, and took out a handkerchief to catch the blood she vomited.

Trembling, she put away the blood-stained handkerchief, got up to wash, and took out cosmetics to add some color to her pale face.

After making herself appear normal, Shirai Mako took a deep breath, took out a small packet of powder from a secret compartment in her bag that Yamamuro Momoko hadn't noticed, carefully put it in her pocket, and then walked to the door to look outside.

There was no one outside.

So she closed the door and went to the door of the room next door and then knocked gently.

...

On the way to the observation deck, Liu Qingyao glanced at the quiet Yamamuro Momoe and suddenly spoke up: "Actually, you've noticed it too, haven't you? Mako's acting strangely."

Upon hearing this, Momoko Yamamuro clenched her fingers into her palm, pursed her lips, and slowly nodded, her brows furrowing as her expression turned sorrowful. "Of course... I found out. Although I don't know what she's hiding... but why would she hide it from me?"

"Have you ever considered that she might be trying to get you out of here so she can do something irreversible?" Liu Qingyao tapped the steering wheel with her fingertips, seemingly giving a subtle hint.

"Of course I've thought about it," Yamamuro Momoe nodded, "but..."