Is the Saekano How to Raise a Boring Girlfriend. flat booster box worth it?
A lottery — value in a few cards
The booster box costs €28.00 today (Cardmarket trend). 11 cards are worth €5 or more — €944.33 together, 33.73× the box price. The top five cards make up 84% of the whole set’s value.
How cards are priced
Most cards in any set are commons worth cents. Whether a box pays off depends on hitting one of the few top cards.
Most valuable cards in the set
Full set →| # | Card | Set | Price today | 30 days |
|---|---|---|---|---|
| 1 | Saekano How to Raise a Boring Girlfriend. flat | €424.99 | -5% | |
| 2 | Saekano How to Raise a Boring Girlfriend. flat | €299.99 | 0% | |
| 3 | Saekano How to Raise a Boring Girlfriend. flat | €43.00 | +27% | |
| 4 | Saekano How to Raise a Boring Girlfriend. flat | €41.91 | -25% | |
| 5 | Saekano How to Raise a Boring Girlfriend. flat | €41.16 | +14% | |
| 6 | Saekano How to Raise a Boring Girlfriend. flat | €34.95 | 0% | |
| 7 | Saekano How to Raise a Boring Girlfriend. flat | €21.16 | -16% | |
| 8 | Saekano How to Raise a Boring Girlfriend. flat | €15.64 | +2% | |
| 9 | Saekano How to Raise a Boring Girlfriend. flat | €7.66 | +24% | |
| 10 | Saekano How to Raise a Boring Girlfriend. flat | €6.97 | +88% | |
| 11 | Saekano How to Raise a Boring Girlfriend. flat | €6.90 | -12% | |
| 12 | Saekano How to Raise a Boring Girlfriend. flat | €4.43 | +162% | |
| 13 | Saekano How to Raise a Boring Girlfriend. flat | €3.87 | -61% | |
| 14 | Saekano How to Raise a Boring Girlfriend. flat | €3.56 | -72% | |
| 15 | Saekano How to Raise a Boring Girlfriend. flat | €3.49 | +151% | |
| 16 | Saekano How to Raise a Boring Girlfriend. flat | €2.79 | -62% | |
| 17 | Saekano How to Raise a Boring Girlfriend. flat | €2.46 | -44% | |
| 18 | Saekano How to Raise a Boring Girlfriend. flat | €2.34 | 0% | |
| 19 | Saekano How to Raise a Boring Girlfriend. flat | €2.34 | -15% | |
| 20 | Saekano How to Raise a Boring Girlfriend. flat | €2.34 | 0% |
Prices: Cardmarket trend, updated daily — as of Oct 30, 2026.
How to read these numbers
The full-set value is what all cards would cost as singles. One box won’t complete the set and the rarest cards are rare, so we focus on cards from €5. If they are worth many times the box price, the set is rich in valuable cards; if value is concentrated in a few cards (high top-5 share), opening is a lottery.
If you want a specific card, buying it as a single is almost always cheaper. A box makes sense if you enjoy opening, play limited/draft or collect sealed product.

