A “POP UP SHOP” featuring the manga *I Discovered the Shocking Secret of a Seemingly Quiet Boy* by Kasiba is coming to MEDICOS SHOP Shinjuku!
From November 13 to November 24, 2026, the shop will feature new merchandise featuring original illustrations themed around “the realm of angels” and “landmine-type” characters, distribute bonus mini photo cards (6 varieties total), and display life-size panels.
・New products featuring two original illustrations themed around “Angels” and “Landmines” are now available
・For every 1,000 yen (tax included) spent on related merchandise, customers will receive one random bonus mini photo card (6 varieties total)
・A venue-exclusive campaign will also be held, offering a chance to win venue-exclusive illustration cards for every 3,000 yen (tax included) spent, as well as autographed bonuses and life-size panels
・Post-event online sales will begin at noon on November 25, 2026, at the MEDICOS ONLINE SHOP
Details on “POP UP SHOP: I Discovered the Outrageous Secret of a Quiet-Looking Boy”
A POP UP SHOP based on the manga “I Discovered the Outrageous Secret of a Quiet-Looking Boy” by Kasiba will be held at MEDICOS SHOP Shinjuku.
Two brand-new illustrations, created exclusively for this event and themed around the “angel” and “landmine” genres, have been prepared. At the venue, new merchandise featuring these illustrations will be on sale, special mini photo cards will be distributed, and life-size panels featuring the same illustrations will be on display.
©Kashiba/IchijinshaNew merchandise featuring original illustrations is now available!
At the event, new merchandise featuring original illustrations—such as “BIG Acrylic Stands,” “Photo Card Collections,” “Clear Card Collections,” and “Acrylic Coaster Collections”—will be on sale.
Random-selection items are designed so that one unopened box contains all varieties. The lineup also includes “pouches” and “illustration card sets.”
©Kashiba/Ichijinsha| Product Name | Price | Varieties |
|---|---|---|
| BIG Acrylic Stand | 2,035 yen each | 2 varieties total |
| Pouch | 1,980 yen | 1 design |
| Illustration Card Set (5 cards per set) | 825 yen | 1 design |
| Photo Card Collection | Individual: 330 yen Box: 2,310 yen |
7 varieties total |
| Clear Card Collection | Individual: 495 yen Box: 4,950 yen |
10 varieties total |
| Sticker Collection | Single: 495 yen Box: 3,960 yen |
8 designs total |
| Acrylic Coaster Collection | Single: 880 yen Box: 7,040 yen | 8 varieties total |
| Pin Badge Collection | Single item: 550 yen Box: 4,400 yen |
8 varieties total |
Purchases are limited to 5 items per type per person per transaction (up to 5 boxes per type). For individual random items, you may purchase up to 5 items per type. Purchase limits may be changed or lifted depending on sales conditions.
Receive a bonus mini photo card for every 1,000 yen spent
During the campaign period, for every 1,000 yen (tax included) spent on merchandise related to “I Found Out the Shocking Secret of That Quiet-Looking Boy,” you will receive one random bonus mini photo card (6 varieties total) featuring an original illustration.
You cannot choose the design, and this offer ends when supplies run out.
©Kashiba/IchijinshaEvent-Exclusive Bonus Illustration Card for Every 3,000 Yen Spent
During the event period, for every 3,000 yen (tax included) spent on related merchandise, you will receive one random event-exclusive bonus illustration card.
As this is a venue-exclusive bonus, it will not be included with orders placed after the event. The promotion ends when supplies run out.
©Kashiba/IchijinshaEvent-Exclusive Giveaway Campaign: Win Prizes Including a Bonus Item Signed by Kasiba-sensei
Exclusively for attendees who make a purchase at the event, a giveaway will be held where winners will be selected by lottery to receive either a “Bonus Mini Photo Card Signed by Kasiba-sensei” (6 winners) or a “Life-Size Panel” displayed at the venue (2 winners). The signed mini photo cards are not a complete set; one winner will be selected for each design.
For every 5,000 yen (tax included) spent on related merchandise, one entry ticket will be distributed. To enter, fill out the required information on the entry form and select your desired prize. A total purchase of 10,000 yen (tax included) earns two entry tickets; receipts cannot be combined.
The entry period runs from November 13, 2026, through November 25, 2026, at 11:59 PM. You may submit as many entries as you like, but participation is limited to residents of Japan. Winners will be notified via shipment of their prizes; please note that the life-size panel is a display item and may have scratches or stains. Entry tickets are limited in number and cannot be purchased after the event.
©Kashiba/IchijinshaPost-event online sales available at the MEDICOS ONLINE SHOP
Items sold at the POP UP SHOP will be available for post-event online purchase at the MEDICOS ONLINE SHOP from noon on November 25, 2026, through December 8. A bonus mini photo card is included with post-event online purchases as well.
Random items for post-event online sales will be sold only in sets; individual items will not be available. Since this is a made-to-order system rather than a limited-quantity, first-come, first-served sale, you can obtain the items by placing an order during the sales period.
Admission Procedures and Precautions for Visitors
Admission is scheduled to be free on all dates. Depending on crowd conditions, admission may be restricted through the distribution of numbered tickets or similar measures; in such cases, announcements will be made on X “MEDICOS Entertainment_General.”
Please note that visitors are asked to refrain from coming to the venue in cosplay or clothing that could be perceived as cosplay.
“I Discovered the Shocking Secret of a Quiet-Looking Guy: POP UP SHOP” Opens November 13!
©Kashiba/Ichijinsha| Event Dates | [In-Store] November 13–24, 2026 [Online] November 25–December 8, 2026 |
|---|---|
| Venue | [Tokyo/Shinjuku]MEDICOS SHOP Shinjuku [Online] MEDICOS ONLINE SHOP (Post-Event Sales) |
| Official Website | MEDICOS Event Page |
| Official X | MEDICOS Entertainment_General Kashiba-sensei |
Frequently Asked Questions for “POP UP SHOP: I Discovered the Outrageous Secret of a Seemingly Quiet Boy”
When and where is it being held?
The event will be held from November 13 to November 24, 2026, at MEDICOS SHOP Shinjuku (Shinjuku Marui Annex, 2nd Floor).
What kind of bonuses can I get?
For every 1,000 yen (tax included) spent on related merchandise, you’ll receive one random mini photo card (6 varieties total). For every 3,000 yen (tax included) spent, you’ll receive one random venue-exclusive illustration card.
Will there be a post-event online sale?
Orders will be accepted via the MEDICOS ONLINE SHOP from noon on November 25, 2026, through December 8. The bonus mini photo cards will be included, but the venue-exclusive bonus illustration cards and the gift campaign are not applicable.
Do I need a numbered ticket to enter?
Admission is scheduled to be free on all dates. Depending on crowd conditions, admission may be restricted through the distribution of numbered tickets or similar measures; in such cases, announcements will be made on the official X account.
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Please check the official website for details.
*Please note that the information in this article may be out of date. We apologize for the inconvenience, but please check the official website for the latest details.
©Kashiba/Ichijinsha
